I had a esophageal stricture a few years ago that was pretty awful. Not sure that's what you're experiencing. I complained about problems swallowing for months until one day I told my GI that I could no longer take the Pentasa capsules because my throat was too closed. That got his attention and a week later I had an upper endoscopy with a balloon procedure. Then I added Nexium to my pill box to address suspected reflux. I believe it was the Crohn's that caused the stricture, but I also have gastritis, so the ppi is a good thing.
I remember vaguely that pred can cause or aggravate reflux, so perhaps that happened and you have some scarring or stricturing in the esophagus.