Welcome, and sorry for your difficulties. As with any changes, pain, that does not go away, you need to tell your doctor, who should rule out a cancer recurrence like the ENT did. They can refer you to a SLP, Speech and Language Pathologist, to help you. Usually they do a swallow study, with a modified barium swallow, and see if there are any problems there, offer suggestions, and exercises to do. I had one done 3 weeks ago, and was able to help.
Good luck.