Don't you DARE think your life is over. Don't ever beat yourself up, I know exactly what you mean in terms of sleep. That expression "a world of a difference" when you sleep better, exactly the same here, spot on.
Of course ppl have cured from it, felt 80-90% back to normal, they were just fortunate enough to find what was wrong with them.
Listen, with today's technology, there's no way you have something incurable.
You have to try certain things, I know it sounds like it's this entire new path you have to try, and you don't have the strength for it, but you'll find what's wrong sooner or later, don't ever put your hands down.
I know the feeling. We've fought a million battles and feel like they were worthless, and now we're barely breathing and have to fight many more.
I've had it 7 years...but I'll never accept this fate of giving up, and I don't have a child and I understand how difficult it is, but your child understands this, there are way worse situations out there not to say yours is easy.
Read up, take your time, nice and slow. This forum is a blessing, I've taken more than I've given here. And it's not going anywhere, we're all here to help you, whenever you want.
Candida, parasites, look at the symptoms for those. Malnutrition, read up what ppl say about carbs and diets. Ask questions, ppl are nice enough to answer you here. Stay curious.
I've read stories of ppl who were basically dead and buried coming back from the dead to go out every day and enjoy a sunny day and chat with friends, go hiking...etc..it's not bullcrap, they just simply found what was wrong and healed it.
FIND OUT WHAT'S WRONG AND LIVE AGAIN ! - it's your only solution.
And the only torture for your child would be to see you give up, hope is the most powerful weapon we possess for it is real, not a dream.