I don't think it's a coincidence that the ESR rate dropped when the fevers stopped.  You may have had an infection that resolved and, if so, you will never get an answer.  At least it all went in the right direction.

It’s rarely a good idea to treat a lab result unless you know exactly what the lab result represents. I don’t know what symptoms you still have, and I’m *very* glad the fevers stopped. If you have no symptoms you might consider declaring victory. That’s what I would do. The sed rate (ESR) is completely nonspecific, and may not mean whatever you think it means. If you do still have symptoms that’s a different story.