If it is an anxiety problem, you could get relaxation therapy with biofeedback. This would teach you how to relax and not hyperventilate. The condition is called dysphagia. Phagophobia is what doctors seem to think you have. If you are very anxious, perhaps that is true, but then again if a person has trouble swallowing, it could make them anxious. So I hope you get it figured out. Good article:
What tests have you had done exactly?
I have acid reflux and sometimes I have trouble swallowing so i chew my food alot and whenever I can't swallow I calm myself and usually cough and it helps