The other night i masturbated and the next morning experienced a burning sensation when i urinated. The pain is at the tip of my penis and specificly at the bottom of my penis hole. That was yesterday morning and today i am still experiencing it. It only really burns when i first start urinating and a little when i am done urinating. I do have sex frequently with my girlfriend and have been for the past two months. I told her about it and she swears that she hasnt had sex with anyone else. I wholey believe and trust her. But i am worried that it is an std still. HELP PLEASE? OK i am adding to it now. Now my glands in groin ar swollen and tender kind of.