you can test 6-8 weeks post exposure for a good indication of your status...at this point it is unlikely your result will change. follow up at 3 months for a conclusive result.
hiv symptoms dont appear that quickly.
100's of common viruses can be spread by sex. but no one ever associates that.
by sex i mean, close contact, kissing. could have just got the flu.
i got a stomach flu from a fling i had. i was sure it was hiv.
test 90 days post exposure.
good luck man