I'm Having An Endoscopy In A Few Days. I Was

I'm having an endoscopy in a few days. I was just wondering if my problem is more gall bladder (eating anything fried...I throw up about an h our after I eat it), I'm also having problems when I need to burp (like after drinking a glass of water) I'm sure it may be I'm swallowing too much air. My oncologist said "GERD" and my family who had problems with their gall bladder say it's gall stones.