I was just reading this topic and was shocked to see others have the same issue I have. I know this is an old thread but I had to post.
For the past 6 years I get similar symptoms. Mine are just behind the sternum. It is especially bad when I eat certain kinds of flavored rice (Chinese) dry meat or starchy foods.
My worst attack was a couple weeks ago when I had a pork sandwich and the pork was a bit dry even with BBQ sauce on it. It "stuck" so bad in that area of my esophagus that I had to vomit.
It is a relief to know I'm not an oddball.