First you make your peace with God, your family and others, then you need to detox. But you must know what to make peace with first. If you have Chronic-Fatigue-Syndrome then what is the decision you are not making? Where do you feel lost in life?
If you have fibro, Have you fallen from faith, or fallen in the eyes of family or loved ones? Did you have an embarrassing physical fall where you have thoroughly felt devalued?
Yes, when you remove the source you will begin to heal, which can be unpleasant and sometimes requires medical care. Detox, herbs etc are also useful at this phase.
I have helped clients get over Chronic-Fatigue-Syndrome in only one session without any healing crisis, but this is not always the case. If we can't discover the source healing will not occur.