Hi... over the past few days (5-6) i have been getting a period like throbbing pain in my lower stomache also a stabbing pain in my lower back and i don't have a clue what it is but it kinda hurts, its nothing to major but very uncomfortable and can be quite nasty sometimes but it only lasts about 5-10 minutes roughly 2 times a day. i know it is a kidney stone as i have already had one of those but this isn't anywhere near as painful. any ideas?