Yes, so having had unprotected vaginal intercourse is a risk, as you know. There are only three risks, having unprotected vaginal or anal sex or sharing IV drug needles to inject drugs. Remember a condom next time. But since you had a risk, you did the right thing. The risk is very low for a one time vaginal sex exposure of less than 1 percent. So, almost nothing. And your test at 40 days shows you didn't get HIV. 4th generation Duo tests are conclusive at 28 days and beyond.