Okay, So I'm 13, I Just Started 8th Grade On

Okay, so I'm 13, I just started 8th grade on Monday. Monday night I was thinking about how happy I was all summer now it's coming to an end. I ended up having a 40 minute panic attack, I felt like I couldn't breathe and I was going to throw up. I told my mom and she told me I'm just stressed out. I only feel sick when I'm at school and I constantly wanna go home. My friends are kinda like this too. We all have cried at one point. I really hate this and I'm tired of crying and not being able to breathe or eat.