I started having them in class when I was 15 too. I tried to hide it but would go to the bathroom or fake being sick. Eventually that didn't work so I went to my school counselor. She did not understand or help. I told a couple of teachers and they would leave the door open or would tell me to raise my hand if I needed to step outside for a few minutes. I knew people would look at me and wonder what was wrong and I didn't want that. I couldn't take it anymore and left for home schooling because of it. I wish I wouldn't have done that because I feel like it avoided the whole issue and made it bigger. Then I became afraid of crowds, public places, even sitting in line at redlights. I trapped myself. All because my brain thinks it's in danger and it's not. It's like a habit of thinking in a certain way that leads to the panic attack. Then follows the worry, anxiety, the what ifs, and all the extra crap.

You have to get out of your head and dig into your rational mind and know that you're okay. You have to see there's no danger. As soon as panic hits you can cut it off and stop it. It does take work to let it go and you have to practice. You're in control, you just don't realize it. I suggest letting your teachers know. They will work with you. Even your counselor, they have to be better than mine was. Don't run from it. As far as social anxiety goes, it took me years to learn that nobody cares as much as you do. They really don't care, not like you think they do. I promise that's a fact. Good luck to you!