I Had An Endoscopy A Few Month Ago And Since

I had an endoscopy a few month ago and since then my acid reflux seems worse. I wake up in the middle of the night with acid coming up in my throat, when I brush my teeth I spit up and even sometimes driving it comes up and most of the time in the morning I don't eat before I leave for work. If I drink ice cold water it makes my stomach more unsettled.