Anxiety attacks getting worse?

Hey forum - long time, no see (again)!

Long story short:
I've had quite a few anxiety-attacks in the past few years. Attacks I would call fairly "normal": around 10-15 minutes, hyperventilating, crying, but I'm able to calm myself down fairly quickly using grounding techniques.
However... I had a really scary anxiety attack a couple of weeks ago, and it scared the heebie-jeebies out of me! I put myself in a situation I kinda knew I couldn't handle (theater warm-up) - but I wanted to try - and surprisingly I couldn't do it.
The thing that followed then was just something I hadn't experienced before. I managed to lock myself in a bathroom and totally broke down; sobbing, screaming, flailing everything, smashing my head and fists against the walls - I couldn't control my body at all. It lasted for a good 45 minutes or something like that (didn't really have any sense of time), and it only stopped because I became too exhausted. It was a really scary and uncomfortable experience, and I really don't want it to happen again.

My problem is now that my anxiety ABOUT getting anxiety attacks has risen a whole lot, and I had to stop going to performance-class and I keep to myself a lot more, which is making me more anxious and sad - and I know this kind of behavior was what led to my depression, and I just really don't want to end up there again.

Do any of you lovely people have any tips as to how to handle this? I'm not able to see a psychologist on a regular basis and I live at a boarding school: being around a 100 people all the time is pretty much unavoidable.

That doesnt sound great! However, i dont think its a huge thing to worry about! I'm not fantastic at advice, but it seems to me that if you had a huge anxiety attack again, it would be because youre anxious about it! So if you just keep in mind that the only reason youd have a bad anxiety attack, is because you were anxious about it, then i would say just try to forget about it, and if the tought happens to pop on your head, just dismiss it, because theres actually nothing to worry about!
Just my 2 cents anyway, hope it helps ahahah

Hi there, people of the dark web
It nice to know that I have people looking out for me, so thanks a lot for sharing my info!
I hope you have a hearty laugh, and then go outside and not share random people's info, because that's a really neat thing to do.