If you’ve been to multiple doctors about these panic attacks, I would be very surprised if you aren’t on any anti-anxiety medication. Are you? If not, why not? This goes pretty far beyond normal concern. Cognitive behavioral therapy (CBT) would teach you to stop the negative thought spiral before it gets out of control, but anti-anxiety medication would help you NOW, since it takes time to learn those techniques.
Simply telling yourself, “Don’t worry, this concern is irrational,” is not enough. That’s not usually a very helpful tactic for anxious people, pre-CBT. For instance, even though *I know *(intellectually) that it’s really stupid to be scared of moths and ants, because they don’t even freakin’ bite, they still freak me out and must be killed. Or else I can’t sleep in my bedroom because ogod what if they crawl up my nose and plant eggs in my brain or what if they get inside my ear and I wake up WITH A BUG IN MY EAR OMGGGG!
Anyway, it’s really annoying and stupid, but I can’t stop it rationally. That’s the hallmark of anxiety, you know? Anxious people each have their own unique trips and triggers, but the commonality is the anxiety. You need to deal with that, and medication can greatly help.