If you had a complete iron panel done, can you please post results and lab reference values?
Hello~The fever and bitter taste in your mouth cause me to wonder if you have a hidden infection. When you had your blood work, did they do a CBC (Complete blood count) I am wondering what you white blood cell is, they could very well be elevated.
You could also be very low in vitamin B12 and the other B vitamins. I would suggest a good, high potency B complex along with a good multi-mineral.
I would also discuss the possibility of this being Chronic Fatigue syndrome, your symptoms also point in that direction as well.
I hope you feel better soon. God bless you.