So for my past periods , I've noticed that when im on my period, when I stand up for too long I break into a hot sweat along with cramping and get very nauseated the longer I stand in which eventually leads to vomiting. I don't why this happens! My iron was low over the summer and I took iron pills (which I thought could cure this) but it's still happening. When I feel this happening I usually go lay flat under a fan and sometimes it helps but other times not. Do you have any idea on if this is normal pms or what this is?