I noticed a small cut in my pubic area near my penis.?
If you have unprotected sex with someone who is NOT HIV positive then the risk is ZERO. If you have unprotected sex with someone who IS HIV positive then your risk is probably high and definitely higher than it would be if you didnt have the cut but your risk is not 100% in either case. It is quite possible to have sex with someone who is HIV positive and NOT get infected yourself - but are you prepared to TAKE that risk?