quick question, why the hell am I burping up an egg taste? I haven't eaten eggs.. my stomach is…

quick question, why the hell am I burping up an egg taste? I haven't eaten eggs.. my stomach is hurting also.. also today my Dr told me that I've probably started to dialate but he doesn't want to check me until my next appt. I would of asked him why I was burping up this taste but it didn't start until I left :/