<s>[INST] before 8 months i had a sexual contact with prostitute girl without condam, and after 15 days i had pain in my panis and headche to till today.but i did HIV and other sexually transmitted diseases of blood test 2 times nothing can be found,so here iam wondering for good suggestion,can you help me? [/INST] Hi, Some of the STD tests have to be repeated after 2 to 3 months. It is better to take a professional help as you had unprotected sex with a prostitute. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr B. Radhakrishnan. Nair, OBGYN </s>