Welcome to the board! The first attack I can definitely remember was when I was in 10th grade. I had such bad stomach pain my mom thought I might have appendicitis and rushed me to the emergency room!
But I'm sure I had symptoms before that. I remember frequently telling my mom that my stomach hurt and I didn't want to go to school all through grade school.
But don't let it get you down, sweetie. Just try some of the suggestions here one at a time, don't overwhelm yourself, and you'll be fine. We PROMISE!! Cause we've all been there, done that!!