I had a urethritis in feb after sexual intercourse with a female partner. The tests for syphilis, gonorrhea, chlamydia, hiv, hsv1&2 have all been negative (as per the latest tests in april). The test only found cocci bacteria in urine and an early sign of syphilis (spot on inner foreskin was treated with penicillin injection ). I recently went on a date in early may but used complete protection. After 1 week of the act, I now notice that the earlier spot is torn and the head of the penis has reddish spots with burning sensation. The skin tear is healing for the past 1 week but the red spots appeared just 2 days back. I have noticed that the inner foreskin reacts to latex condom and some kind of lubricants. I am not sure if I have sti or some sort of allergy. Please help to understand.