Losing regained weight,being healthy again

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Hello fellas, so I need a little help from those of you who have gone through the same.
I suffered from anorexia (physically only) and from 55kg i went to 37kg.
I was forbidden to work out for 2 months and was kinda forced to eat absolutely everything, no matter how healthy it is. So, for a month I gained 11 kg. Now I'm 48(looking fatter than ever), I have to go back to 45 just to feel OK, and also I can start working out. The problem is- I feel so used to eat whatever and not working out that my motivation just flew away. Please, if someone has gone through this, share your experience with going back to your normal,healthy lifestyle!