I have test multiple times for hiv in 72 days of exposure. All came back negative there were naat, rna pcr, 4gen test, vdrl, elisa tests. All came back negative but I got penis tip red spots and groin rash which is reoccurring. Thats why I saw a dermatologist and he told me to retest every 6 months till 1 year for conclusive result. Im still gonna do one more test after 90 days. If my 90 days tridot test came back negative than can I rule out hiv or still I need to test every 6 months?