Your symptoms sound far more like a bacterial and/or fungal infection to me, right down to the milky discharge and reddened appearance and itching. STD tests done look for things like bacterial infections that are not gonorrhea or chlamydia. Other bacterial infections are common after unprotected anal sex. Have you taken any antibiotics in the course of things? Have you tried any anti fungal medicines?
So tell me how many days altogether you think you took acyclovir, in total?