Hi, I have been experiencing right sided neck pain. I have hypothyroidism so I thought maybe it had something to do with it. It started earlier today and has since moved into the ride side of my chest. It almost feels like it is moving from my neck into my chest in shooting like motions. It sometimes hurts in my arm pit. I have insurance but my copay is $2,000. That will lapse back over at the beginning of the year. We are living paycheck to paycheck. I can not afford to go to the doctor if this isn t something serious. My question is should I be worried enough to go to the ER?