I'm 17 years old and I first got my period when I was 15. It has always been really heavy, lasting around 5-7 days and more then 90% of the time they are excruciatingly painful for me so much that the majority of the day is spent writhing around in bed. This doesn't limit me from walking around and using my laptop in bed to take my mind away from the pain but I find it difficult even then to do anything except lie down and accept it. The pain feels like a sharp stabbing/squeezing that comes in waves, originating somewhere around my intestines and spreads down to somewhere above my pubic region (I think is the lower half of my abdomen). Also during my period I get bad bouts of diarrhea (disgusting I know!) and really bad back pain.
I always assumed this was normal because I had no real comparison due to my family being very shy about the subject of sex, periods, pregnancy etc. but recently I have become quite concerned after reading about things like Dysmenorrhea, Adenomyosis and Endometriosis. I just need help determining if this is indeed normal or if it sounds like I may have a problem :/
I am 5'5 in height, weigh around 127 lbs with a healthy BMI. I don't smoke or drink regularly and have never used birth controls pills, always using condoms. My family has no history of any serious conditions.