Hello, I gave birth nearly two years ago. During the pregnancy, I experienced severe nausea every morning at about 11am. It was so sudden that I had to lay down or I felt I was going to pass out. I later found out it may have been caused by the prenatal vitamins. Now, I am not taking these vitamins, I am not pregnant, and yet I am experiencing the same symptoms every month usually one or two days after my period. It s very uncomfortable especially when I am with my daughter or at work. My hands start sweating, I feel weak like I will pass out, my heart starts beating faster. Then it goes away and comes back at some point during the day. Any thought on how I can prevent this? Thanks.