Your real problem is whatever is causing you that level of stress. That’s going to have to come from your doc or psych. Don’t let them fall down on the job. You should NOT be that physically stressed out all the time, and it’s wearing on you mentally. That’s what’s causing the nightmares - your mind is trying to create a reason WHY your body is continually so stressed out and feeling under attack.
Get that dealt with, and the nightmares should lessen.
In the meantime, all I can offer at this point is trying a combination of physical relaxation training and inducing lucid dreaming. It’s gonna be a bitch to start up because you’re already sleep-deprived and on-edge, but it’s worth a start.
First - relaxation training.
Look up Deep breathing Exercises
. You can’t be stressed and relaxed at the same time. It doesn’t work. What most people don’t realize is that you can trick your body into relaxing (at least somewhat) by purely PHYSICAL means. The downside is that you have to really commit to the techniques - a deep breathing exercise may take up to 30 minutes to complete, and it doesn’t really help if you don’t continue until you’re at least somewhat relaxed.
Also check out Progressive Muscle Relaxation where you tense and relax muscles on purpose while consciously keeping your thoughts trained like a laser on JUST THAT ONE MUSCLE that you’re messing with. It’s really hard, but it’s doable, and it works well. The mental challenge of focusing also will help with achieving lucid dreaming states, so that’s a bonus.
Between those two techniques, you should be able to get a handle on your *physical *stress levels at night.
Now, the nightmares and the lucid dreaming to take care of the emotional stress.
First off, are all of your nightmares the same or similar? Usually people get themes - gory shit, suspense/creeper vibes, chase/stalking…
If they are, then one day while awake, you need to write up a scenario that explains to your satisfaction a different angle that the dreams can end on, and keep it by your bed. If not, you’ll need to write one for each main category they fall into and keep them all handy.
For example - if you’re suffering from horrible gory shit - write up a nice short scene, very descriptive. An example would be of someone offscreen yelling CUT and then all of the boring behind-the-scenes action of the actors (the people in your dream) walking calmly away, casually waving to each other, talking quietly and happily in corners, calmly getting sodas, settling into relaxing chairs with boring books, resting in chairs with their eyes shut, getting OUT of costume and makeup and into boring and mundane clothes (be very descriptive of the mundane clothes, not of the gore and makeup), set workers coming in with vacuum cleaners or mops to clean off the stage and recreate the set as something friendly, reassuring, and boring…
You want to make it as simultaneously totally descriptive and emotionally neutral/soothing as possible. You also want it to be fairly short - nothing more than about a page. Make it as comprehensive as possible as to the set-up, so that it can easily apply to any of your gory nightmares.
If you have the suspense nightmares, or the chase ones, come up with defusers for them instead with the same feel to them - descriptively boring and soothing.
Here’s what you do with them. When you wake up - hit a light, and read that sucker over and over and over again. When you feel like you’ve got it burned into your brain, lie back in bed and close your eyes. Are you visualizing what you read, or thinking about the nightmare? If you’re thinking about the nightmare (even a little) sit back up and read that sucker again. This is when you want to throw in the deep breathing exercises and/or progressive muscle relaxation exercises here, to get your body relaxed again also.
Keep that cycle going until you can lie back down and close your eyes without thinking/fearing/worrying about the nightmare. It may take hours. It may take all damn night. That’s ok. If the scene doesn’t work - look closely at it. Is it *really *innocuous and boring? You want essentially elevator music in textual format, lovingly and carefully recorded in nearly agonizingly boring detail, carefully tailored for you specifically and what you find soothing and boring beyond belief.
Keep that up every time you have a nightmare. What you’re aiming for is associating waking up from a nightmare with a relaxing but super-boring interlude where your mind is kept busy, and your body is consciously relaxed back to sleep. Over time, you should eventually get to the point where your body will recognize the nightmare when it’s starting, and you’ll wake up faster, or even right when it’s starting. If that happens, still read the boring scene and relax yourself. You really want this to be a consistent pattern - every nightmare wake-up gets a boring scene recitation and relaxation.
At this point, I’ll warn you to resist adding other rituals along with this. You don’t want to always get a drink. You don’t want to always have the same blanket, or a special pillowcase that you switch to. You don’t want to have to look out the window, or sit in a particular chair (it’s actually best if you don’t ever get OUT of bed at all) or anything like that. The only ritual needs to be the reading of the scene and the relaxing of your body. If you use other rituals, there will come a night when you* can’t *use them, and that is not good. Don’t go there.
So, now you’re waking up just about every night - sometimes you wake up before the nightmare gets really going, sometimes you’re not so lucky and you wake up at the end, and sometimes you wake up even before you have a nightmare, but you feel a little bit unsettled. But now, you read your boring scenes, you do about 30 minutes of deep breathing, work through a nice set of muscle relaxations (remembering to think very precisely about whatever muscle you’re on) and then you go back to sleep more relaxed. This is good.
This is the point where if you’re really stubborn (and maybe a tiny bit lucky) you should get to the point where your mind has a subconscious association between that boring shit you wrote and the nightmares that are showing up. At that point, what should happen is that every once in a while, you’ll notice in the dream that things are heading towards nightmare land, and instead of waking all the way up to read your script and relax your body, you’ll have that process memorized and it will be such a pattern, that you can do it in your sleep - you’re consciously (more or less) guiding your dream back into non-scary territory by not letting yourself get worked up in the first place.
You can help that last step to happen by taking time to either lay in bed before or after you fall asleep and think about what you’re seeing and doing in that misty sortof-thinking-sortof-dreaming hazy liminal state. I find that it’s easier for me when I wake up, my best friend has much better luck when she’s drifting off. You want to try and keep a light touch on your awareness of what you’re doing and dreaming about, and to try and interject when it goes somewhere you don’t want it to.
Again, the real goal is to control your dreams without waking up, but I am in a minority where I think that lots more people can get to the control level where they can at least* monitor and then force themselves awake when dreams go pear-shaped*, and so I think it’s important to practice that skill also.
The last thing I can suggest is to be really paranoid and restrictive of your media intake. Don’t watch the news, or look at any news sites or websites with lots of really emotional or arousing pictures. Try to read good news articles, or boring ones. Do you watch a lot of TV/YouTube/Hulu? Cut out anything bloody, gory, stressful/suspenseful, or morally fraught for you. Even if you think that it’s not bothering you, it’s providing material for your subconscious to torture you with. Do not give it that material.
Good luck!