Hi Daisy, I don't normally post here and I don't have much experience with eating disorders, but I wanted to welcome you to SR. Have you checked out an OA meeting yet?
https://www.oa.org/
I was bulemic in my teens, now in my 40's I put on some weight a few years back when I sobered up. Since the beginning of this year I've had some success with Weight Watchers, I feel like I'm back to the old me (without the alcohol) so I guess this is the new improved me.
I wish you the best, and look forward to hearing more from you here.