Horrific cramps!!

Kristen
Hey guys so every time I get my period I get cramp so badly I start throwing up. Once I throw up, I don't stop. I've gone days and on some occasions a week with throwing up every 15-20 minutes. It's landed me in the hospital more times than I can count from the dehydration. The best way I could describe how I am when I have these episodes is a "conscious coma". It is very debilitating. Worse part is my doctors have no idea what's wrong with me.  These episodes sometimes happen every month, and sometimes it doesn't happen for 5 months. It's very random. I have never in my life met someone who does thru this kind of thing so does anyone on here have a similiar experience ?