i had unprotected sex with a girl 12 weeks ago, whom I didn't know but have reason to believe that she was somewhat promiscuous. Since then i remember having diarrhea about a week and half later, although it seemed to be a diet related issue. I had no other symptoms. Now, 12 weeks later my mouth seems continually dry, I have 2 canker sores/cold sores (seems to have some pus) one inside my mouth on the lower lip, and the other sort of on my gum. I also had a headache all day today, and a woke up in the middle of the night a few days ago with a really bad headache (which has never happened to me before). I don't know if this could be simply stress from worrying about possible infection, but unfortunately I won't be able to have a test for the next 3 weeks. In the meantime could someone let me know if these symptoms are typical of a primary hiv infection/ acute hiv infection/ ars? OR do symptoms basically only appear 2-4 weeks after exposure? I seem to read different things, some people saying symptoms at 12 weeks could be indication. Please let me know! your help is greatly appreciated.