hi, I have a enlarged thyroid, my symptoms for the last few weeks are, swollen neck, swollen throat, difficultly swallowing, food getting caught in my throat, tiredness, joint pain, mood swings, feeing like im being chocked. I have thyroid blood work done and everything came back ok. I was exposed to high levels of xray radiation for about a year and a half while working as a veterinary assistant from 07 to 09. Im going to get an ultrasound done on march 3rd. im concerned I have cancer.