I've known I've had Interstitial cystitis for 4 years bladder pain has never went away no matter what procedure was done 2 years ago I had a polyp removed from my cervix came back non-cancerous after my period a month ago I've had severe pain in my lower back legs and abdomen I have this every month including cramping this time it just didn't go away so went to doctor they ran tests found a 1.8 cm cyst on my endometrium could this cause my pain and should it be concern for cancer