Hi christo,
i know exactly how you feel and what kind of frustration you are going through. Although my problem is a little different to yours, I get the same attitude from the docs.
My advice to you begins with pretty much with what I have done; search the internet for similar cases or symptoms. A site called medhelp offers you a chance to get a docs opinion free online, it might be useful although usually they just advice you to see a specialist. My idea is that what you have could be a laryngeal nodule, but I only say it because I read a bit about it while I was searching for the diagnosis of my condition. And also, that is what the gp's do, they sit in their surgeries and look up symptoms on the internet. (...)
also, if you are concerned about it and you want answers, be persistant, demand to see a specialist so that you can get peace of mind, however be prepared for ridiculous waiting times starting with 6 months. I have been waiting for over 3 months now and I have been so persistant, I have been a complete nuisance to my gp, but I haven't managed to get him to write me an urgent referral, therefore I am just going to see a private specialist. I can't really afford it but I mean, I am not going to wait around like a fool when I could be wasting my time in case I have something more serious, just because the gps ignorant attitude.
It is your health, not theirs, and if you feel you need to know what is going on, push them.
You will not be calm until you know.
Good luck, I really hope this advice helps or maybe your problem is already gone by now :)
xx cristina