Vurping (vomit/burping) sorry I know it's gross!

Tiffany
I've Just recently started experiencing getting a little extra bonus in the back of my throat if I burp while laying down.  Well today it happened while walking around....I don't feel nauseous or even heart burn but now I'm terrified to puke at any moment when this happens, totally catches me off guard....anybody experiencing this at 31 weeks?