Tony in the mean time you might want to sleep with your head slightly elevated so your stomach acid will stay down in your stomach, and you will have less acid reflux up in your esophagus, and avoiding coffee and alcohol and other substances that really cause the stomach to produce lots of acid. These are just every day common sense things to try until you see your Doctor.
There are a whole bunch of things that could be causing all this hiatal hernia to who knows what, and the fix might be as easy as taking a pill. So for now ( I know the waiting is the hard part) untill you see your doctor, try and relax and maybe try those those things to keep the acid down, and in your stomach!
Good Luck to You