Last month I had constant urge to urinate for 2 weeks like I had a UTI without any burning but went to dr and test was negative. Dr prescribed cephalaxin anyway for 3 days but the next day my period started and all my symptoms were gone. Now this month same constant urge is back without burning when I pee but a little burning inside lips of vagina when it gets wet etc but mostly burns right where uretha begins. No burning inside vagina. I am not sure if my period is near because I am very irregular. Could this be a UTI a yeast infection or could it be my period again? Also have read stuff about stds and that has me worried! Please help!