Welcome to JA and thanks for asking
Two things to do here
First keep an eye if you develop any symptoms like urinary burning,pus in urine or a rash in the genital area.
Secondly test for HIV should be taken as well .The most accurate results are at 12 weeks but even at times it takes six months before which it get positive.So it should be tested.
Also in the meanwhile a screening test for various STI,s should be taken. Although these tests yield more positive results when a person is symptomatic but initial infections can be asymptomatic. I would suggest to have an appointment with an STI clinic and get tested. In the meanwhile avoid having unprotected sex with someone stranger and adapt safe sex practices.
Feel free to ask if you have any more question
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You should be tested for Chlamydia,gonorhea,HIV,HBV,HCV,Herpes and syphillis.
The chances of acquiring these infections are variable .For example HIV transmission can range from 0.3 to 3 % and also variable for other diseases.It also depend upon the type of exposure,high risk sexual activities and multiple other factors.
Following is the schedule for STD and HIV testing after exposure. For HIV and HBV and HCV test can be repeated at six month also as very rarely it get positive late