Spazgal: I have recently developed similar symptoms. It started after a night out drinking with a trip to the hospital because the swelling had cut off my breathing passage.
I am familiar with the constant swallowing because you feel like something is there, but there isn't.
Caffiene, smoking, sugar, and alcohol seem to add to the problem. I have bendadryl that I take and it used to take care of the problem. But now benadryl is losing its punch.
I quit smoking recently to see if that helps. Time will tell. I am very scared.
I am planning to see a ear/nose/throat specialist soon.
Let me know if you have had any recent developments.