I had protected oral and vaginal sex with a sex worker in the Philippines. I didn't change condoms after the oral sex. The next day I had nasal congestion, and kept on thinking about having been infected with HIV. I looked up the initial symptoms of HIV then kept thinking of them. Then, of all things, I had a slight sore throat at 6 days after the encounter, then an itchy throat and cough the next day. I don't feel healthy every time I think of having HIV symptoms. I didn't seem to have a fever through all that though, I just felt hot whenever I worried about the initial symptoms. I had an HIV blood test at 12days after the encounter and it was negative. But I know that HIV detection can take longer than that. Then I got something swollen at the back of my neck, and though it was a lymph node, but could be a big pimple. I squeezed it and it got wounded, but is healing after two weeks, but there is still a slight bulge in the area. Could this be a lymph node?? I still worry up to today, at 28days after the encounter. I still have the nasal congestion until now. It doesn't really bother me that me much, but it keeps me worrying about having HIV. Please help me. What do you think are my risks?? Do you recommend having a retest??