Re: NO doctor will listen to me!
This sounds very similar to my experience. I saw at least 20 different GPs, was in the hospital 3 times, and went to 3 different ENTs before finally getting anyone to help me.
The best thing to do, at least from my experience, is to hone in on a list of things it could be. Then determine which medical diagnostic procedure would be best to use in order to rule those things out. Maybe it's a scope, or a CT of your throat, or a certain blood test.
Then go to a doctor and specifically request those tests. Most doctors, if directly asked for something and given a valid reason, will permit the test.
Just be persistent. As the previous commenter said, it can be demoralizing (I can't tell you how many times I came home from seeing a doctor just bawling my eyes out), but eventually someone will help you.