I'm at like a good 7-8 on the pain scale AFTER I pee, I also have my period(2nd day).this started last night, and seeems to have gotten worse, especially now. 2 nights ago I had sex on a very full bladder, and couldn't empty it.. But the test was NEGATIVE for a UTI.. I just emptied my bladder now and have some lower ab cramping and sharp twinges like I still have to go.. anyone know what this could be!??