Trouble burping after meal

5 days ago I had a meal of fire roasted shrimp & Cajun pasta and beer. After eating, I felt fuller than I ever felt. It didn't pass til the next day. I tried to burp and could not. I finally didn't feel full, but since then I feel nauseous sometimes. I still have a good appetite. I can finally burp, but it kind of feels like like something is in the back of my throat, & I could throw up. (I haven't). I feel fine otherwise. Is it acid reflux? Please help. Thanks