I have just started experiencing these same symptoms that you are describing (pelvic pain, back pain) except mine is a bit higher, more like abdominal pain and upper leg pain, along with the back pain, but I am also experiencing a bit of a discharge (not red). I have no history of fibroids, and I don't think that its a bladder infection because going to the bathroom is normal. I thought the pains might be from bowel problems which I sometimes have, but that doesn't seem to be it either. It feels like I'm getting my period, but it doesn't come. I have no itching, but could this be a vaginal infection?