My social anxiety makes me freeze up and look like a freak when people talk to me. But when I get a panic attack it is all flight. I just want to escape. I get similar symptoms to you, heart palpitations, cold sweats migraines, as well as chest pain, dizziness, and others. My brain is telling me if I don't get away I will die. All I care about is getting somewhere safe. I get filled with nervous energy and I shake and pace.