I am a homosexual male. For the past 10 days I've been having burning sensation when i urine it goes away and comes sometimes the pain is there and then it completely goes away i been only with my fiance of 2 years we always are safe. I do not understand what this could be i got tested twice for all hiv and stds all negative i do not have any complications when i masturbate but sometimes when i pee it hurts what can i do to make this go away?