I Have Been Having Symptoms For 4 Months And My

I have been having symptoms for 4 months and my current provider is having trouble with a diagnosis. I have severe fatigue, muscle weakness, tremors in my hands and occasionally my right leg. My WBCS have been slightly elevated at 12. ESR is at 70. CRP is 2.2. All other lab work WNL. I have seen Cardiology, Neurology, and Rheumatology. No one can give me a clear answer. Do you have any recommendations where I should go next?