Welcome to HCM.
In the question, it is mentioned as unprotected sex.
But in the presentation, it is mentioned as protected sex.
If it is a protected sex from the beginning to end, then your chance to get HIV
is negligible and your symptoms may not be related to HIV.
If your sex is unprotected one, it is better to have a blood check up for HIV and rule out the same. If you had unprotected sex the risk for HIV cannot be ruled out. Symptoms could be due to HIV primary infection if there is risk.
Good luck to you.