Should you feel your partner had a questionable HIV status and you engaged in unprotected sex, you need to test to know. Symptoms do not mean a thing.
The best course of action for you right now is to wait for another week and get tested at 28 days with a IV Gen HIV test. Incase you do not have access to the aforesaid test, you can get tested at 42 days with any standard HIV antibody test.
Also, I would like to add that the symptoms you have described are not in consistent to HIV ARS. ARS symptoms if it happens are mostly heavy, they all come at once, wrecks your body to an extend where you would have to go to the ER.
Always insist on condoms to protect your self from STIs in the future. Good luck.