Two thoughts cross my mind.
The first is that, absolutely, at this point it's time to put on the blinders. Have that precious baby and focus on you and that baby.
The second is: do not despair. Remember that people with addictions do recover. Not all of us, of course...but quite a few of us.
This forum, wonderful as it is, tends to attract people whose loved ones have not recovered or are newly abstinent.
So...have that baby and keep your eyes on that prize but do not give up hope.