27 Male Gerd for roughly 4-5 Years

Hi all, I have a endoscopy scheduled next month but already nervous. I have most symptoms of gerd on and off. Some days it just flares up out of nowhere then I can go 2-3 months without it then get it again. I also noticed I have something stuck in the chest/throat feeling and also with bread it tends to move down slowly and sometimes I can actually feel it moving down. However the feeling of something stuck is still there in chest when the food has actually gone. I’m wondering has anyone had that feeling with chronic gerd and nothings been found. Also what is my chances of barretts?