It is good to hear from you again. Goodness, you have had a hard time these last few days. What does your Mom and Dad say about it all? When you become dehydrated, you will more than likly be admitted to the hospital. Having inflammation in your asophagus is very concerning.
When I get "tetany spasms", my doctors treat it immediatly because it can interfere with breathing. Though I would venture to guess that inflammation is very different from what I experience.
Do your parents have a plann as to what to do next? Is there someway you can get your peditrician to perscribe a "spray" to numb your throat?
PLease let us know how you are doing. It is so hard to know of someone so young, suffering so horribly. Hang in there.