Dr. I had protected sex but the girl was on periods and some of the blood touched the base of my penis and thighs And while washing off with water if enters your penis tip then it causes a risk? I have a cyst on my thigh from long time, so will a blood come in contact with the cyst is there any risk? Also I got my self tested with hiv duo test cmia At 36 days after the incident and result non reactive (.27). Is my test conclusive?