What Causes Recurring Pain In The Pelvic Area?

I have a recurring crampy twinge of pain in my pelvis area . If I point to it, it is at a pretty precise point, about an inch or so away from my right hip bone, towards center of my abdomen. I am 49 and officially in menopause - I have not had a cycle for well over a year. I weigh about 145 lbs and am about 5 5 . I used to be slender but have gained some weight the last few years and do feel bloated in my abdominal area (that is wear I don t look so slender anymore). The twinge of pain or crampy feeling comes and goes sometimes many times a day. I did have surgery for uterine fibroids when I was 36 (in 02) and then a successful pregnancy at 38 (in 05). Then four miscarriages followed my successful pregnancy, if that is relevant. I did undergo embryo transfers and the accompanying hormones and meds, etc during those two transfers (in 08). So.. I had two biological miscarriages and the two adopted embryo transfer miscarriages. Perhaps all irrelevant, but just giving you history of my reproductive issues. thank you.