The reason it's getting worse is because you're expecting it to. You fear it, therefore it happens.
Now, I don't know if this is related to what you're going through, but I have a weird throat condition called Zenker's Diverticulum. I've had it since I was a kid.
http://en.wikipedia.org/wiki/Zenker%27s_diverticulum
Sometimes things get stuck in my throat. Mostly glutenous things, like rice and bread. I can still breathe normally, I just can't swallow. It's where food gets caught in a 'pouch' that's in my throat and waiting for it to clear usually doesn't work; I have to go get a full glass of water and keep swallowing HARD until I flush it out of there.
I also sometimes have problems with my airway going into spasms and completely closing up to where I can't breathe very well. Breathing out is easier than breathing in. The only thing I can do is try and get through it (which is terrifying, to say the least) until the spasms stop and my airway starts to slowly open back up. But this doesn't normally happen when I'm eating. Just swallowing my saliva the wrong way or if a drink of water goes 'down the wrong pipe' causes it.
Yours sounds a little more severe, though. You said you've seen docs about it, but didn't really say what their diagnosis was. What did the doctors tell you?