16days ago i had sex (vaginal). no symptoms other then burning sensation in stomach. and cough has been there for two weeks. anyway related tostd, hiv?

Unprotected sex: Sexually transmitted diseases & infections in men aren't usually associated w/burning sensation in stomach although depending upon what you mean by stomach, you may have a bladder infection or urethritis. Initial infection w/hiv may lead to "worse flu ever" (http://aids.Gov/hiv-aids-basics/hiv-aids-101/signs-and-symptoms/). So get tested if you're at risk.