I've had a root canal and an extraction/implant done many years ago. Recently, my tooth pain came back to bother me and it's sensitive to hot/cold water. Yesterday, all of a sudden, I came down with flu-like symptoms - fever (101+), shivering chills, severe body aches and headache, loss of appetite. I don't have other cold symptoms like nasal congestion, runny nose, cough, etc. My fever broke earlier today.