On the weekend I had probably one of my worst panic/anxiety attacks ever. I was fighting with my bf and crying and then I couldn't breathe and was hyperventilating and he managed to calm me but I was almost throwing up it was that bad. I think I freaked him out a bit but he's great at calming me down. It was scary and I didn't even notice it coming. Now I think back to it its pretty blurry... I haven't had one for about 6 months or more so i'm not sure if they are returning or if its just a once off...