Congrats on 46 days T. As far as your physical recovery goes, I think your body will tell when enough is enough. You just have to listen to what your body is saying. You know the feeling of a productive pain versus one that's sending you two steps back. I've been there when I tore my ACL snow skiing and had reconstructive surgery. I knew when I was pushing too hard and send myself backwards in recovery.
As far as your concern that you might return to drinking based on your reward system. You've got the power to never go back there again. You've got 46 days and that's a great start. Nothing good will come from picking up that drink again. But you're fully aware of this, so use your motivation to continue your physical and mental recovery.
Be well!