I have a friend who every time her menstrual cycle starts she gets very ill. She has prolong vomitting. Today she vomit up a yellow substance that looked something like the yellow part of fried eggs. Every month during her cycle she goes through the same thing. Fatigue, vomiting, and heavy bleeding. She do not have any kids.(not sure if this is any help) She cant keep anything down and she stays in the bathroom all day because of the heavy bleeding and more so the vomitting. Is it possible that she have an ovarian cyst.