This isn't a GI-related question, but I'll address it anyways.
There are a variety of reasons for a high serum protein level, including, infection, cancer, inflammation, or autoimmune disease.
The next step would be to consider a serum and urine protein electrophoresis to help elucidate the cause.
These options can be discussed with both your personal physician, and in conjunction with a hematologist.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin Pho, M.D.
KevinMD.com
Twitter.com/kevinmd
It isn't likely diet. Causes seem to be infection, inflammation and bone marrow disorders. Eating protein isn't listed as a cause. Your wbc is at the low end of normal too. Strange. Infection and inflammation would tend to make this high, but some cause a paradoxical lowering.
I suggest you go to a hemotologist.