Am I having a panic attack?

So, I have these really weird moments but i'm not sure if it's a panic attack because I dont feel scared. Quite often, I get this wave of something at random moments and I start to get really hot, i sweat, my heart rate and breathing increases and I feel like i can't breath/suffocating feeling, I feel like my legs can't keep my upright and I feel like i'm going to be sick. I don't actually know if it's a panic attack or not since I don't feel afraid, but maybe I am worried about something and I don't realise it. My mum says it might be anxiety but It happens so often and I'm really not sure. Normally it happens when I'm at school, when it feels really strong I ask to go to the toilet because i feel like i might throw up but i never do. Can someone tell me what's happening?
Am I having a panic attack?
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