Apparently, I have a right ovarian cyst. Not normally something to sneeze at, though I had no idea they could cause this much pain unless they ruptured (had that happen when I was 16). But, apparently they can. Found a list of symptoms at mayo clinic and it matches perfectly. But, then I was also reading at medicinenet that if you have pain it could mean a couple of other things, such as rapid growing or stretching, etc. So, I have to follow up with my gyn. Since I take aygestin for endometriosis, which also prevents ovulation, I should not have an ordinary "functioning ovarian cyst". The joys of being a woman.