Ever since I was a toddler I have had panic attacks. My heart races, I hyperventilate , crying, but the thing that worries me is when I have an episode, my whole body clinches and almost vibrates. This happens in pulses. There are no triggers to my 'panic attacks' other than my chronic nausea, and none of my doctors have told me why this happens. I also tend to get visual migraines often. After a panic attack, I can't remember what happened other than I had an episode. However I am responsive and aware of my surroundings during the episodes. Are these seizures? Or just really severe panic attacks? Any answer would be better than what I've gotten my whole life, nothing.