Did the ENT discus acid reflux with you? Reflux can cause the symptoms you described. You could try an OTC acid reflux med like Pepcid, Zantac, Zegrid or similar med to see if that helps. If it does you should get back with your dr for follow up.
Painful swallowing is called odynophagia. Difficulty in swallowing is dysphagia. Reflux (GERD) is a common cause. Lump in the throat and extra production of phlegm are other common symptoms of GERD.
Your ENT should be well equipped to identify it.
Is the pain excruciating, like a charley horse? If so, it sounds like cricopharyngeal spasms. If not, count your blessings.