Pain in the Back of Head When Swallowing

Hello, I have been experiencing a sharp pain in the back left side of my head when I swallow food or drink. I injured my neck a few years ago and have three consecutive slipped disks in my cervical spine and I have been experiencing extra neck pain and headaches these past few days. The pain is moderate for the most part and the headaches are dull and throbbing and have not gone away or felt better with rest and medication. My main concern is the stabbing pain in the back of my head when I swallow anything. It is very sudden but very painful and I would say it is a moderate to severe pain. One that makes me cringe and drop what I am doing at the time to grab the spot that hurts. It's been four days now since the headaches began and three days since the pain in the back of my head when swallowing started. I'm not too concerned but I wonder if I should be. Any thoughts?