Sinus surgery 3wks ago.running fever, sore throat, aches, heart beating fast. dr said not strep or flu. could it be from surgery? debride once a week

Concerned?: You may have contracted a cold which can cause the symptoms described. However if the fever is over 103 degree then I would suspected an infection. A rare bit problem from surgery may be a sponge left behind causing an infection. If the problem gets worse or lasts >a few days, you need to check with the surgeon again and perhaps even insist on an imaging study on the sinus.