I am so sorry, this was hard to hear I am sure. I have have fibromyalgia, which is similar to chronic fatigue. For me, it was also caused by a combination of this religion, a stressful job, a bad marriage, and a child with a serious mental health problem. There is only so much a person can take before the body breaks down. This was twenty years ago and though my life is better, the problem lingers on. I learned to live with it and was doing well until three years ago when I developed another issue. It has been very difficult, I am in constant pain and have to take pain meds now.
What works for me is meditation, every day. I must get adequate sleep, so I have a routine that I stick to, no going out late, no TV after a certain time, no bright lights or loud music before sleep. No caffeine, no junk food, and I take a good amount of vitamins. I try to get some exercise every day. I ended up going gluten free, that has helped me a lot. I try to maintain a positive mental attitude. No matter how hard it is, I have to be grateful for the things I do have, that is very important. I have to be honest enough to see when my own thinking is contributing to my problems.
I have not given up looking for a cure, I research and read everything I can find. Doctors can help you a lot, but at the end of the day you know yourself best. Don't hesitate to to challenge your doctor if you think they have it wrong.