Okay, i'm fifteen. My periods are always fairly regular, if they don't happen at the end of a month then they happen and the middle. I don't skip months and I always bleed from 4-5 days. However, on the first day i'm incredibly sick. Like I have never been so sick in my life. It's not in my lower abdomen, it's really high in my stomach like near my chest. I don't cramp, unless it is when i'm sick but it's rare. I started my cycle when I was ten, and it's always been pretty much the same. Does anyone have any idea what this might be caused from? Or what I can do to help? Thanks so much for the answers. It usually gets a little better when I go to sleep but not always.