You need to leatprn how to pace yourself OP. And stick strictly to the minimum amount of physical effort in anything.
You need to accecpt you life has changed for the next few years and make plans how to survive.
Plans include
practical plans- getting shopping delivered, getting a cleaner once a month.
Doing your laundry in a laundromat, with folding service.
Medical support plans- seeing ME groups and making contact with someone in RL who had survived . Contact your local ME charity.
Get a nutritionist and follow her diet plans explicitly - I was Dx with a candida overgrowth and one year of the most excluding diet worked wonders. I took supplements as well. ION and Bant are a good place to start.
You need to stay off fb and you need to ignore ANYTHING and ANYONE who disagrees with your plans to get well, or fights you or drains your energy in any way. Just say NO.
Let your friends know how they can help you, but tell them that your life is different now. My friends were as good as can be expected, but I changed a lot of them after the first 5 years of being ill. They just weren't able to keep up with my life on the sofa!
Find a yoga teacher for relaxation exercises. Ring one up and ask her to come round for a few one on one lessons to start you off. Get some lovely relaxation tunes from YouTube.
Treat everything you do for yourself as a cure, and if it doesn't nurture you, drop it.
My ME lasted 8 years, and I'm fine now. I was brutal about dropping anyone or anything that didn't help me. I didn't fight it, or anyone, I just accepted I had ME, and ignored and dropped everything not helping me get well.
Read about the spoon theory in But you don't look sick and use your spoons wisely!
Stay positive, it can be a one step forward two steps back until you find your rhythm, so don't be disheartened. We've all been there.
Good luck, and wishing you and everyone else afflicted with this awful dis- ease the best of rude health!