Sorry TMI but I'm curious

Before my period I cramp for about a week before it comes on and off and it's pretty tolerable and it's the same thing after my period. But during my period the cramps are so bad and I can feel them everywhere. I vomit and have diarrhea throughout the first day. The pain is so bad to wear I literally cannot stand up straight. No pain killer works at all. Idk if it's normal but I even get cramps in my butthole. With all that going on it's extremely hard for me to stay hydrated so I'm constantly feeling light headed and dehydrated. Any tips?