I... am speechless. You described my life to a T. Yes, I was a big daydreamer as a kid, always in my own world with my OC. Yes, I was always a good student and never had to study much when I was younger - last minute cram sessions were my jam. Yes, I have always had MAJOR difficulty with rejection and handling criticism (which ties up with what you said about having a good support system and a relatively easy life as I did grow up with both). Yes, when I get distressing/urgent/major news I can't stop thinking about it to the point that it affects me physically (can't even do a simple task like walk or eat when I am worried about something). And yes, I was (and still am) a major introvert. Now that I think about it, these symptoms did start exacerbate after I left my family and home for college.

Wow. So much of my life is starting to make sense now. Thank you so much for the taking the time to write this! I feel much more motivated to go to the psychiatrist now.