Your general symptoms, high white blood cell count, and favorable response to antibiotics suggests that you have what is referred to as an occult infection. Your appendix or gallbladder may be infected, or you might have a tooth gone bad, or you may have any of a long list of other infections and pathogens. Cancer or Type C viral hepatitis cannot be excluded. I recommend that you get an immediate referral to the leading infectious disease specialist in your area, or get to the best teaching hospital in your region. An occult infection can quickly turn septic and become life-threatening.
I’ll mention this to quack definitely.
Regarding my use of “quack” is the opposite of what most people think.
My sense of humor is a tad dry and maybe blunt but I have nothing but the highest regard for medical people no matter the job. I don’t have the stomach or nerve for it.
First aid and field stuff can handle and I will do what I can to help. I try to at least read up on the stuff once in a while.