Good luck! Tooth/jaw pain can be a bugger to sort out. My missus had terrible problems every winter for years, it used to be like going out with a bloody eskimo! She was bounced backwards and forwards between doctors and dentist, treated for non-existent infections, had several trips to a maxillofacial consultant, was in pain every winter for years. In the end she changed dentists and the new chap said that the build-up of fillings over the years was distorting her bite - and when she clenched her jaw in cold weather it was triggering the pain. He ground down some of the worst ones and the relief was immediate.