I have had the same thing, I am convinced that it is my thyroid. I developed symptoms when pregnant with my 3rd child, extreme cold and fatigue and shkiness at night. After I had the baby it got worse. I had problems wwith the feeling of fullness in my throat and at night I tremble like f* as Im falling asleep. I have seen my doctor so many times. The first time I had test for thyroid because I had goitre in my neck. To me it is obvious what it is but because my bloods were in normal range they mucked about checking everything else. 3 years on I am still in the same position. I have terrible lump in my throat which drives me insane, I get bad palpitations, I shake at night, I have carpal tunnel syndrome, I feel pain like nothing on earth, I get numbness everywhere, even my head if I stay in the same position at night. My skin is dry and crepey and my boyfriend has to walk around in shorts all the time because I have to keep the house warm. It sucks, it gets you down. I am currently following South Beach diet and had lost nearly half a stone, then within a matter of days Ive put on 4lb despite being really good...coincidentally its when my throat and palpitations has flaired up really bad.
I really feel for you pinkbasket. I hate the way they try and pin everything on anxiety. I once went to the docs because I was having trouble catching my breath. I came away with a prescription after theu convinced me it was anxiety. Every spring my 'anxiety' would come back...eventually figured out that it was the pollen in the air causing my breathlessness...