Hello. Thanks for writing to us at healthcaremagic Unprotected sex with a commercial sex worker is a risk factor for transmission of STD s.I would suggest that you visit a sexual disease specialist for counselling related to STD s and appropriate testing. Though, headache and tiredness are not specific symptoms of an STD, however, you need to be thoroughly investigated at appropriate intervals. These symptoms may be entirely unrelated and just be part of a viral flu like illness In addition to the testing, if you notice symptoms like urethral discharge, burning micturation or develop genital ulcer, inguinal swelling, any genital growth/warts etc you must report it to the doctor as soon as possible If I was the treating doctor I would have asked for a test for HIV, Herpes, Syphilis, Hepatitis B at appropriate intervals. While testing for herpes can be performed as early as 2 weeks with an ELISA based test, screening for HIV and VDRL is usually performed at least a month after sexual contact. HIV and VDRL should be repeated at 3 months if the initial tests were negative. Similarly HBV can also be tested earliest at 3-4 weeks after sexual contact. Regards Always practice safe sex with a condom!