Does anyone have it? I’m trying to understand more about it as my blood work came back normal and these weird symptoms just reoccur.

Also anyone who developed it in their 20’s? I’m 21

Can anyone tell me more about their symptoms and how long each episode will last etc.? Like I said trying to figure out if I have it. My doctors are stumped as of today since my blood work was normal but I can’t keep on like this it’s starting to affect my day to day life.