hi doctor , i had sex with a chinese escort(prostitute) , it was on 9/10/2013 , since then i was worried of STD s and HIV , i used condom , i didn t broke , her vagina was dry and i didn t noticed and fluids from her during the intercouse, i have also never done such activities before, the duration was very small it was about 1 minute because i stopped the intercourse and told her to go. i didn t have any symptoms now, i am a medical student , 4th year. please reply and help.