What may be the problem in my throat?

about two weeks ago i started have a weird feeling in the bottom of my throat - (the bottom of my neck) its indescribable. well recently i have been having the feeling frequently - actually all day yesterday and today i feel a sort of heaviness in my lower throat. My swallowing is fine - doesnt bother me at all - no pain. Well i just ate lunch and now im experience a lil burning in the same spot. what is going on?? why the heaviness like something is stuck? could this be a thyroid problem?