5 weeks ago i recieved unprotected fellatio from an online escort. This lasted about 10 to 15 min until I came in her mouth. I think she had a tongue piercing (stud). I tested negative at five weeks for HIV. I know this is not definitive but, I read on other posts that a 4 week test is 85% to 90% and 6 weeks is 90% to 95% accurate as far people who are positive being positive at these times. I couldn't stand to wait a week for the six weeks and a local clininc was giving free tests on the day I went. Today, I feel a slight sore throat and some tingling or dull pain in my armpits. Does anybody think I have anything to worry about? Should I take the negative at 5 weeks as good sign and forget about this whole experience? Do I need furhter testing? I also have not had any fever or swollen nodes as far as I can tell.