Oh man, I can sympathize with Dr.'s not really hearing you! I am sorry they sent you for an x-ray - if our symptoms are the same (and they do sound that way), I would say an x-ray to see if something is stuck in your throat is a waste of time. For me, it feels as if it is happening in my esophagus/lung area - not my throat - and, it doesn't feel like anything is stuck there - it almost feels like a spasm.
Anyways, I appreciate the response to my post and I hope you get somewhere with your Dr.! Look forward to hearing from you and I will be in touch if I find anything out as well.