Dental issues can be a long journey.
Sometimes they need to be redone. Did you get a cavitat?
Why not do icu program and clean out cavitation

So I should get the one tooth that has a filling pulled?

After dental cavitation a jaw bone infection may reoccur 50% of the time! That is flip of a coin! So, you may have to have it done twice. I had dental cavitation done twice and then a year later I had it all checked and I was stunned when the dentist steps in with my x-ray he took with his high powered high tech machine One site clearly showed infection, since I was still sick I thought that must be it. I had that one site cleaned out and that was the third time! Seems absolutely insane, but I did it because I want to get well and not have it cause serious health complications, a bone infection is serious. I'm stunned the cost was like 1,000 to 1,200 a pop that seems crazy too I did see a super well known expert it was worth it to me.

There is nothing fun about paying for rework!

Sorry to hear about the lack of progress. Which dentist performed the surgery? Also, do you have an update on your condition?

Get the proper check up for it.