It's a great that you've gotten your endoscopy over with. Polyps are fairly common, I think. (On the lining of the stomach, too.) Mild inflammation of the esophagus would be consistent with GERD. Hopefully your doctor will try a different PPI, if the omneprazole isn't working for you. It's too bad you have to wait for your consultation, but your doctor will have more information at that time, so it's probably good.
Don't worry. Mild inflammation isn't Barrett's, which is what everyone is worried about.
We'll be interested in what you find out on what your doctor has to say.