She wasn’t too shy to post a thread on a public message board titled “Vagina tightness”, so I doubt if she’ll have any problem broaching the subject with her doctor.
I have experienced this from a man’s point of view, and we found the best way to overcome it was with lots of foreplay, and just try to relax.
Don’t you think an anonymous message board is just a bit easier than talking to someone face to face?
Haj
When my wife and I were young and just getting started with intercourse, she was “tight”, so I had to be especially careful about the pace of things. Things did become a bit more comfortable, and then a lot more comfortable as we continued. After childbirth, there was more “room”
After some surgery, everything was very tight…we had to do exercises with various diameter devices over a period of 6 months before normal intercourse was possible. We took the opportunity to explore a lot, so it wasn’t as bad as it sounds, BTW. Patience and a sense of humor helped a lot.
Good luck to you…hang in there, and I hope this helps.
No, you aren’t the only cynic here. I have my doubts, especially seeing as she hasn’t posted again.
You may want to try a lubricant called Astroglide. You say you get really wet, which does help a little, but this stuff is great. Me and my wife suffered from this problem and once we started using Astroglide, our problem was solved. I mean you can just about squeeze a golf ball through a water hose with this stuff. Might want to give it a try. For everyone else out there that doesn’t really have this problem, I would still suggest getting it because it makes things intresting and is great for foreplay.
I like the fact that “Highsociety” is talking about vaginal tightness.
sarahsarahsarah, men will never be interested in you now because you have a tight, wet pussy 
That kind of thing really makes them run screaming.
Actually, my mom tried to tell me something similar when I developed boobs. “Men don’t like to see women in bikinis, dear. They think it looks so slutty. Try this nice one-peice on instead.”
If you’re in pain, see a doc.
How nice of you to accuse me of being a troll for not posting more than once in 24 hours. Some people do have lives you know. 
Anyway, I do not have medical insurance, so I will not be able to go to the doctor. I think instead I shall try various sized inserts over a period of time. Is there a kit for such a thing, or am I supposed to just go to the sex shop and say, “I’ll have one of those, one of those, and one of those…”
Yes, we have tried orgasm through masturbation before sex, but it doesn’t really help. It just makes me REALLY wet, but still tight.
Yes, I’ve heard of people like that (those who have lives) . It’s a terrible thing really…
In any event, put yourself in our shoes for a moment, what does your post look like to the casual (cynical) observer?
Some of you folks need to read that sticky thread at the top of this forum, the one called “Accusations of trolling”.
Here, I’ll help you out:
I think y’all need to give the OP a break. Even if sarahsarah83 is for some reason making this up (and I see no reason to suspect that), this is a real problem for many women. Some are so “tight” they cannot even use tampons. That is not sexy, it’s just painful and inconvenient. Whether the OP is being honest about her condition or not, a serious answer here could help other Dopers. That’s what it’s all about, isn’t it?
Provided the condition is not due to any medical problem, the best thing for a woman to do is work on stretching herself out a bit with her fingers. And I don’t mean just before sex, I mean on her own time, steadily, over a period of weeks or months. She should start with one finger (her pinky, if need be), insert it into her vagina, and wiggle it around a little. Eventually she should be able to work her way up to two or three fingers at once, and when she is comfortable with that she should be “loose” enough for most sexual activity. If she still has problems, she may wish to switch to using a dildo or other sex toy.
I’d like to emphasize that it is far better for a woman to begin with her own fingers rather than a sex toy. Most toys are far too large (I know I’ve never seen a pinky-sized dildo, although they may be available somewhere), and it is much easier to control the movement of your own finger than something you are holding. Just be sure to trim your nails.
The only real point of concern I have here is that sarahsarah83 should have been told all this by her doctor or nurse the first time she went in for a pelvic exam, as her problem would have become obvious when they tried to get a pap smear. This suggests to me that sarahsarah83 has never had a pelvic exam, and that is a big no-no for sexually active women. Health insurance or no, you need to have a pelvic exam soon and you need to keep having them regularly for the rest of your life. There are women’s health centers where you can get a check-up inexpensively, so there is no excuse for not having one.
<hijack>
Where do you order BC pills from online? I’ve been looking for a place to do this for awhile. But the ones I’ve found only ship by prescription, so I’d still have to go in and get the pap done.
</hijack>
There are a lot of potential reasons for this sort of problem, ranging from medical problems to psychological tension. Personally, my vote is for a mixture of inexperience and nerves.
The vaginal muscles stretch (or relax, or whatever term you want to use) over time, making intercourse much easier for everyone involved. The more you have sex, the more you’ll stretch out (for lack of a better term) to fit whatever you’re putting in there, but if you stop having sex/using the dildo/whatever, the vaginal muscles will start to tighten back up. They’ll never go back to their pre-sex state, but you’ll notice a difference, trust me.
I think another part of your problem may be nerves. If you’re not quite comfortable with someone, just aren’t mentally in the game for whatever reason, or are subconsciously expecting it to hurt, you’re going to be tense. When you’re tense, the muscles are fairly inelastic, and the lack of give is going to cause you at least some discomfort if not outright pain.
Personally, I’d suggest a mixture of private toy use and plenty of massages, booze, or whatever relaxes you.
I’m with Lamia on this one. Well, not the pelvic exam stuff per se, I don’t know anything about that, but that you should go to the doctor for whatever regular things need to be done. I know being poor and uninsured makes a big difference. I have to hit my folks up for money to pay for my regular oncology check-ups, which I’m overdue for by the way. I don’t know your situation, and I don’t want to know. Maybe you can’t turn to your folks, but if you can do it. Don’t be stubborn. Women’s health center, county clinic, whatever. Phone calls don’t cost much.
After checking with your doctor: If this is the worst problem you encounter in life, consider that you’ve got it licked.
[Don’t even.]
I’m disappointed with the responses of a lot of people in this thread.
I think its funny that this thread has been open for approx 25hrs at this point and has over 1200 views. 
Talk about a hook…
I’ve said it before, I’ll say it again: free clinics or clinics with sliding scale fees aren’t really that hard to find. I don’t have insurance, and I was able to go to the doc last week for $10.
Think of it as a really thick balloon. It’s made to stretch (to pop out the puppies…babies heads are BIG) and as others said, the likelyhood is that it will over time. Perhaps, though, the problem is that your fella is a bit too well endowed (it happens,) well, here’s some advise for you.
Where else would you get sensible replies to a question like this but the SDMB?
I suppose this was just trolling, too?