I had vaginal sexual exposure with condom. there was some blood outside the condom as girl was on last day of period. hiv rna quantitative (viral load) and 4th gen hiv duo on 22 day - neg. hiv duo test on 30th day -neg chance of hiv +ve after 3month?

This was a near-zero risk exposure: your partner probably doesn't have HIV, and even if she did, you used a condom and the blood was on the outside. Negative duo test is nearly conclusive at 30 days, but requires 6 weeks for truly conclusive result. Have another test then, but no need for testing at 3 months. In the meantime, you can safely assume you don't have HIV.