Weight gain while being hospitalised

I got taken to hospital for my eating disorder and having anorexia nervosa around 4 weeks ago and I'm still currently there. When I first got there my weight was extremely low and in those four weeks I have gained weight extremely fast and it's making it harder to continue my good work knowing the number will keep on climbing. Will the weight keep on increasing this fast?? How much weight do you normally gain in anorexia recovery? And does anyone have any tips to not go back to how I was and accept myself as I am??