I feel butterflies in my chest, I can feel lightheaded, I clench my teeth and when it's really bad my whole body starts to tremble as if I'm freezing, my teeth can even start to chatter.

Actually has anyone ever experienced these physical symptoms before.....
It hasn't happened in a long time but when I was in my late teens/early 20s sometimes everything around me would start to look either extremely far away and small OR look like everything was giant and I was small. Then sounds would come together in some sort of weird rhythm like my breathing would be in sync with the clock ticking on the wall or the traffic outside, any sound really would all just be in sync. I never knew if it was dissociation or not but it could get scary because when I was in it something would feel familiar with the in sync sounds, like something from childhood and I would try to mentally explore those feelings but it could cause this panic. Like a very scary sense of urgency to stop. I've tryed exploring this with my T but we have yet to come up with an answer.