Panic attacks at 14 years old?

I'm 14 and turn 15 in August. I had a panic attack on Sunday (June 5th) for the first time. I was laying in my bed trying to sleep, about to finally fall asleep and I saw the freakiest face, and I wasn't asleep yet. It was like a skull with red pupils. I stood up, didn't know what to do with myself got really dizzy couldn't feel anything but my heart beating insanely fast and hyperventilating. I couldn't go to sleep for 2 1/2 hours after that. Then today, I had an exam in my band class. I had to play for my teacher, and I started sweating, he told me to do scales and I started one and did really bad because I was hyperventilating. Then I started to get dizzy and freak, but I couldn't get out of my seat because it was my grade, it got the the point where he was telling me what to do, and I was getting hot flashes and couldn't feel my body and had the same symptoms from Sunday night. I don't know what to do. My heart was beating fast all day. I feel like I'm doing it to myself, but it wont stop.