Help!!!!!

Hi , Recently (12 days ago) i met a woman in a bar.. we drank and the rest u know. we had unprotected sex although i went in and out very fast !
i dont know her and after few days i got very scared! yesterday i went to do the combo right after the test i felt not good and my throat heart and feel sick! do i have the symptoms?. is it not going to be accured for me?

also , live in USA and from what i understood the combo is goo even after 72 hours.

Please help!!!