Hello, Welcome to HCM,
Firstly, I do not understand one thing, when you know, that having sex with someone will lead you get infected by HIV
, then why did not you use condom? That was the only thing which could keep you worry-free.
Your present symptoms sounds like ARS.
For confirmation you have to do first an ELISA
HIV1&2 . If the result is negative go for p24 protein assay. If that also becomes negative go for DNA PCR for confirmation.
If all the tests are negative, HIV infection is unlikely.