Take a deep breath and calm down. You said that your tooth was getting better with the corticosteroid, you already knew that you had a problem with your vertabrae, and to be honest, I also get sore throats if I sleep with a fan.
It is easy to let your mind wonder and analyze every symptom you have, but it will only drive you crazy.
Go see an ENT and get everything checked out. It is the only way you will feel better.

Mucoepidermoid carcinoma-intermediate grade. Removed 3/05. Additional surgery to get clean margins and selective neck dissection 4/05. 30 lymph nodes removed. All clear!!