I had a total hysterectomy / oopherectomy in 2003. Now, for the last 3 weeks, I have had severe lower abdominal pelvic area cramps and a lower backache. If I hadn't had the hysterectomy I would be convinced I was about to have a period. I do have IBS, but I am not having any of the other symptoms that I would normally have (no diareaha, not constipated) -- this feels different. Should I be concerned? Do you have any thoughts as to what might be the cause?