I have been having some very strange alarming symptoms over the past few weeks following a vaginal sex exposure which was unprotected. This happened one time and it was a brief encounter with no ejaculation. About 3 weeks after the encounter, I started spotting. That lasted 4 days. Then I developed a yeast infection. A week and a half later I woke up with a severe neck and back ache and had a one day bout with diarrhea. I was also a little light headed and didn't really have an appetite but I was able to eat anyway. I'd say I didn't really feel sick like a cold or flu but just very achy. I had to lay on a heating pad for days to help relieve the pain. Realistically, Could this all be stress induced? Or does it sound like seroconversion? There was no fever, rash, sore throat, cough, night sweats, swollen glands from what I could tell, fatigue or anything but the back ache just came from out of nowhere and lasted for like 4 days. Also, my breast have been very sore and ive missed my cycle this month. I took a pregnancy test which was negative. Im freaking out. I read that these sorts of changes can be due to hiv infection. I feel like a fool for making such a big mistake. Has anyone ever experienced all of this and its not hiv?