While yawning at work earlier today what I believe was a lymph node popped out from under my jaw with a very significant knot, and began to seize up the entire right side of my neck and jaw (like when you stretch and get a Charlie horse). This knot then disappeared suddenly and I began to get very hot and sweat profusely. I began to head to the bathroom and my eyes became dark and disoriented as (when you stand up too fast). My ears clogged up and I began vomiting. Any idea what this could be?