Okay. I have been having a pain in my lower left stomach and lower left side since January 2007. Occassionally, my lower stomach hurts and my vagina just feels weird. This has been happening on an "on and off" basis since December/January. Sometimes it occurs when I am on my period but most often it doesn't so it probably is not menstrually related. I also take birth control pills. At first I was diagnosed with a uti and given painkillers and antibiotics and I felt better. Then it came back and this time my urine is clean. What could this be?