At times I get a feeling of a lump or balloon in my throat. When I drink more than a sip of water I get a funny feeling, then a sensation goes up to my head, numbness and then sort of black out for a couple seconds. I feel nasiated and have a growling sound from my throat. This will last all day and usually into the next day. Then I am perfectly normal for sometime. I have had several endoscopies, barium swallow and Otolaryngologt did test through nose and down throat. Also motility study. Nothing has been found to cause problem. Could you have a clue to this very bad experience I have had for aabout three years?