I want to kill myself. I've had very painful periods since they started (started at 13 and I am now 24)

I tried BC for awhile when I was 16 and that helped for about a year. Then it just didn't anymore. The first 2 to 3 days of my period have me on the floor in tears almost every month. I have such bad bloating I can't sleep bc my tummy feels like a balloon. I get constant stabbing pains in my uterus whether I'm on my period or not. Diarrhea but also hard time pooping at the same time?? I spend at least 23 days of my months in severe pain from bloating. I've never been to a gynecologist bc I'm a broke bitch but I really need some comfort lol I need to know if it sounds like endo or just bad periods??