Hi Sir I Am A 20 Year Old Guy Just

Hi sir I am a 20 year old guy just finished my college, during my holiday I have unprotected sex with a young lady who is my age but she had a sexual affair with another HIV AIDS infected person who on medication..
I'm just asking if there is any possible way of me getting infected but on the other hand I don't see any symptoms of HIV AIDS in me and its almost a year now but when I was trying to play rugby league I usually get weak in some minute's..