Dear sir/mam, my frnd is 26 year old and he did unprotected sex with a women (may be prostitute). He did this mistake first time in their life. He did sex for 20 seconds to 30 seconds and ejaculate. And there is no injury on penis and no blood comes from vagina. But he is depressed now, what if that girl is HIV+? He don't know. So what is the probability of getting SDT like HIV? After how many days he will take test? please give suggestion what to do? When he will go for test. He did sex on 2 may 2016. He is totally depressed.