Hi im sara, just wanted to say i am sorry for what you are going through, MS is a very hard thing to live with and cope with in reality it isnt going to go away, i can understand the eating and sleeping as your stress levels are to high to sleep or eat, but you need to try to eat to keep yourself going and keep functioning.
If you dont mind me asking what form(s) or self harm are you doing? When do you do them? Sectioning you is not a good idea as other people do not understand unless you talk to them, talking is a good idea, have you got anybody to talk to? friends family ?
You can always talk to me, PM
me anytime, if you need or want a chat if you feel bad ill be there, take care, stay safe x