I am having swelling in my left cheek after having two upper root canals on the two teeth just left of the front teeth. It has been 5 days and the swelling seems to be working up into my left eye. The area is real sore and it seems to be plugging up the left nostril. Could it be infection, or is this normal? I was numb for 3 days after the injections. I still feel numbness is that from the swelling?