I Have Red Blood Cells That Do Not Contain Enough

I have red blood cells that do not contain enough oxygen and therefore i am ALWAYS tired, no energy, balance is off thinking skills not well ,spelling,etc. I was bedridden for almost a year. Lost 60 lbs, most of my hair, skin peeled 3 times, got chicken pox and well as cancer. I am doing better,but not improving to the point i can drive a long distance, and still get very tired.