Oh… so pretty sure THIS pain was a good old fashioned abcess. I stuck some floss up in where the cavity was filled and flossed extra hard and out came some lovely pus and blood. The radiating pain has been slowly going down since then and the cold sensitivity is less as well. Still plan to call the dentist to have it checked out just in case, but was glad I said something to friends on Thursday night. 3 weeks of suffering for good old fashioned dental pain.