You’re sounding good. Seems that you’re reconciled to the outcome even though it may not have been what you would like. That’s good – we didn’t choose this path but all we can do is make the most of it and you’re doing that.
There will be ups and downs along the way of course, but the downs will get less and the ups more over time.
I think that so long as you’re certain in your own mind that you did everything you could to save the M you will have peace.