Nauseous after a meal? 😷

so lately i been getting nausea and throw up after every meal... I don't know what it is acid reflux or something else.. it's not a stomache flu .. my period isnt til another 2weeks.... so i doubt  i'm pregnant .. I did have unprotected sex but still i doubt it cuz my period isn't even close yet... please help me i can't even eat right without me wanting to throw upÂ