You never had a risk for HIV and do NOT need to test.
ER doctors do not prescribe antibiotics for the flu, which is viral. They are treating you for a possible bacterial infection, which HIV is NOT.
It's possible the antibiotics are causing some negative side effects or they are not working against whatever possible bacterial infection you may have. If you do not feel better soon, or continue to feel worse and have a fever, I suggest you see your doctor for further testing, or return to the ER.
Thanks for your response, today my whole body aches like you wouldnt belive just going up the stairs is painful, could this be side affects of the medication? I just find all this so weird never been sick like this, not like the typical flu at all
Unless you had unprotected insertive vaginal sex, you had NO RISK.
Symptoms mean nothing regarding HIV. Sounds like you have a cold or the flu.