Thanks so much Carlo. I should state that for the most part it was predominately low-grade fevers…typically 99.5F/37.5C. They did come with really awful sickly bodyaches though. The fever would start late morning and last all day until midnight. So every single day it went up and went down to normal again.
Right now I’m 99% certain it was an autoimmune condition called Drug Induced Lupus. My positive ANA blood test pattern results suggested it as a likely possibility and it turned out I was on a drug known to trigger the condition. So four weeks ago I I began slowly tapering off the drug and - voilà - the fevers began subsiding and now for the last week they’ve completely gone!
I could have gotten some really really cool gear with all the thousands spent on the numerous scans, blood tests, and visits to specialists trying to figure this thing out.