I have had unprotected sex with a guy that i know for a while now and am worries because i have a mild warm burning feeling in my urethra. The unprotected oral sex was on march 31. 2 weeks after i went for a test for HIV syphilis gonorrhea and Chlamydia all came back negative. Now i don't know if i should be worries about HIV since it been two weeks after the unprotected received oral sex that i went for a test and not three months. Could it be a sti-std or is it just anxiety that I'm feeling this? Some answers would be greatly appreciated.