The vomiting happens again. Just had this relapse on Saturday and yesterday. The bad thing is that I don't even know what causes it. For my fainting, I could easily identify that it is presynope caused by low blood pressure, but what about the vomiting? I gag but nothing comes out. I experienced the gagging around three years ago and had relapses ever since. Sometimes it's caused by stress, but for this relapse I do not know what causes it. 

I worry for dance practice.