Glandual feaver tiredness fatigue sleepy no energy

Patient: Hello my names james and i went for a few blood tests and it came back positive for glandual feaver, but a week later they said that i previously had it and i do not any more but i am allways tired and fatigue and mentally drained and no matter how good my diet is and no matter what multi vitiman i take nothing helps, i been for blood tests and all my levels are fine but apparantly i am experiencing symptoms of this glandual feaver what can i take or do?

Symptoms: Tiredness fatigue mental drained

Doctor: