How do I improve foggyness and fatigue

I will be doing mu 3 year anniversary for Dialysis in April. Since then especially in the last 9 months my health has declined. First it was migraines after Dialysis that actually was an issue with blood pressure. It took my Nephrologist a while to get it figured out. But there were many trips to the ER which were not fun. I know blood pressure issues are not easy...but the fatigue and foggyness still remain. I feel that while Dialysis is saving my life...I feel it is slowly killing me!