Last night I woke up to pain in my neck, pain unlike a sore throat. Close to my chest. When I eat or swallow too. Acid reflux or heartburn? Take tums (calcium carbonate)?

See a GI doctor. Use of agents which reduce acid production in the upper GI tract may be necessary, but first you need to be examined to make sure there is no other manageable cause for these symptoms. Go see someone and get this worked out soon.