A while ago I had one of the worst panic attacks I’ve ever experienced and I have had a lot. Pretty much what happened was as I was having it, I was shaking so much my whole body was moving the couch and weirdly my legs became heavy almost ? It was like I had a big cramp in them and I couldn’t move them. They were lifting up in the air shaking and I had to force them down with all my strength. When I tried to walk it was hard and I almost fell. I felt stiff legged. Eventually as I calmed down it went away but it absolutely terrified me. Has amotine experienced this or know what it is? Some background information: I do take vyvanse and was just starting that day on Prozac. I also was at the gym that day I don’t know if that has anything to do with it.