Panic attacks at school?

Hey guys, I'm a 16-year-old girl and for the past few weeks I've been suffering from panic attacks. They happen when, for example, I feel the slightest bit sick or dizzy in public. I get so worked up about it because I think I might throw up or faint that I then have a panic attack. For me a panic attack is like this: first my head and hands start to tingle and then I have hot flashes (it feels a bit like suddenly getting a fever), then I feel sick, I have trouble breathing, I'm dizzy, I'm shaking really badly, I feel like I'm going to faint or vomit the whole time, I'm completely weak and the worst thing is that this feeling doesn't go away without what feels like 1000 tablets or without me leaving the situation. Nothing helps. Calming tablets only help when I'm a little bit nervous, but when I have a panic attack, no amount of distraction (music, podcasts, painting, stress relief toys, conversations with friends) helps because I'm so engrossed in my thoughts, which only make things worse. Yesterday I went to the doctor and he prescribed me tablets (herbal) and I'm worried that if I take them for the first time before school tomorrow, they won't work and I'll have another panic attack (I've had to go home a lot because of them). By the way, as soon as I'm out of the situation, everything goes away, but at school just going to the toilet or the playground doesn't help because then I have to go back to class and that drives me crazy again.

Do you have any tips for me on what I can do in such an acute situation? Because when I think about having to go back to school tomorrow, I'm getting really nervous. What should I do? Do you have any tips I can do? Staying at home and completely isolating myself won't help.

Thanks!