Clearly here could be more to your health. Any more root canals? did you see a biological dds to remove the root canal? Did you get a pano-cavitat and electrodermal screen. If not get screened-you easily could have more infection without a root canal
FYI-its only sat. I have had this done and it took me a week or more to feel better-lots of vit C
PS-its Sat and the root