That was a very brave thing that you did...you took action on your sitch. I've had moments like that too when I followed my gut instinct, even if it might be anti-DBing, because I knew I had to do it. To me this seems like this was something you had to do, b/c after all....you're talking about your happiness here.
Now, to be frank... you have just asked your H to make a choice. You've given him a few weeks to think about it and decide. But your H may not be ready to make a choice on your time schedule ( if you hadn't brought this up do u think he would have made a choice on his own in a couple of weeks? ).
BUT....and this is a big BUT...it does not mean that this will all backfire. What you said to your H was so heartfelt and sincere...you put it all out there. You laid out a plan to really give your M another chance. Maybe your H was waiting for another chance but not sure how it could be implemented...where it had a good chance at suceeding...and where the 2 of you didn't just fall back into a routine.
The next few weeks will be hard for you...waiting to see what he says. But have faith! This may be exactly what you needed to change your sitch.