You never needed to test in the first place. You had no activity that could or would result in HIV transmission. The only ways HIV is transferred is unprotected vaginal or anal sex with penetration or sharing IV drug needles. Fingering, no risk. Air exposure. And oral sex, no risk. Air exposure and saliva also inactivates the virus. Your test was not necessary in August and was negative due to no risk. You definitely do not need to test for a non risk again. Hope that helps.