i get really bad pelvic cramps about 2 days before my period, they are the worst the first day of my period and on that day it will hurt really bad and then my stomach and pelvis will start getting all tingly like they're falling asleep. i get lower back pain ONLY around my period, but it's severe enough that i had to stay home from school for 2 days because i couldn't walk. My periods last 6-8 days ususally, they come about every 5 weeks and i've had them for 5 years. I've seen my doctor and he's given me progesterone cream and vitamins...should i be more concered?