HELLO ALMOST 4 YEARS AGO I HAD UNPRTECTED SEX WITH

HELLO ALMOST 4 YEARS AGO I HAD UNPRTECTED SEX WITH A FEMALE FRIEND. I LATER STARTED TO EXPIRENCE INTENSE ITCHING IN THE PUBIC ARAE AND ON THE SHAFT OF PENIS. I ALSO HAVE A ON AND OFF PINCHING FEELING IN THE HEAD OF PENIS. OVER THE PAST 3 YEARS, I HAVE TESTED FOR EVERYTHING NUMEROUS AND NUMEROUS OF TIMES. ALL TEST WERE NEGATIVE. CURRENTLY, I STILL HAVE THE SAME FEELING/SYMPTOMS I PREVIOUSLY DESCRIBED. I have taken Cipro,Dyoxcillin,Bactrum, Lotrisone cream,Pyridium and metronidazole because I thought it could have been trichomonasis. IM LOST AT WHAT THIS FEELING COULD BE.