Can Menstrual Cramps And Cramps After Intercourse Be Related?

Hi. I am 25 years old and have had 3 kids. All my life I have had painful menstrual cramps and a somewhat heavy period. About 2 years ago when I got my Mirena removed I started having periods so heavy I have to change my tampon every 2 to 3 hours and even at night. The cramps since then have been bad but I am able to handle it with motrin. I was diagnosed with HPV after my 2nd child was born and had a biopsy and they removed pre-cancer cells. I have had 2 abnormal paps since then but no other biopsys. Within the past 6 months I started having bleeding in between my periods. It only last 2 to 3 days. Also I have been having extreme abdominal and pelvic pain during and after intercourse. I do spot blood afterwards as well. So now for the past 3 weeks I have been having discharge that ranges from white and milky to white and chunky and sometimes clear mucous. I want to know what is going on and if anyone else has experienced these problems. I have had negative results for UTI, yeast infection, and no STD's.