That is so much to deal with at once.
Perhaps separating it out would help- concentrating on one thing at a time?
Being scared of getting better is normal- fear of change is something we all have to some extent, and when we are not well that is heightened.
ADs- well, all ADs are not the same. There are many different types, and they work differently for different people. Sometimes we need that chemical help too- illnesses like this may have a psychological or emotional trigger but they change your chemistry too, and there is no shame in using something to change that back. If you had a broken leg you would splint it, ADs are a chemical splint- once the body has the chemical balance back, it can get on with healing.
I have no experience of ED, but there are lots of people on here who have, and there are lots of other sites out there with people who are going through similar things on. Maybe a quick google? For someone like Beat? There are lots of fora too which might be better in terms of someone to chat through, even if it's just virtual handholding from a place where they understand you.
Mothers... well... I could go on all day about mothers...
Another thread perhaps? Have you been on the stately home thread?
There are a thousand of threads about mothers under relationships- I have found a lot of help, advice and support on there.
And the biggy... leaving a relationship.
I am so sorry you are going through this, and of course it means you are not getting the support you need at home but you have been so brave- obviously change has been needed for some time- but you have started to make that happen. That is a really positive thing.
Things will still be so raw (do you feel some relief though?)
Perhaps practical steps are the way to deal with this atm. When can he move out (I assume he is leaving, not you)?
What financial support will you get- from him, from the state? Do you have your own bank account?
What access to the children will he have?
Do the children even know yet?
Again, there are many many threads about this on here- relationships, legal/money, etc.
You have taken huge steps this week... I cannot imagine the turmoil you must be in. Just take a step back, and let nothing happen for a while- it takes time for the water to clear again.
I don't do {hugs} but if I did there would be a huge one {{{{}}}}