You say he now seems a little distant. Did you ever suggest ending it because of your health concerns? Maybe he is not distant because of you, maybe something you said. Maybe other things stress him out and it has nothing to do with you. If it were me, I'd enjoy every moment with him, life is too precious and too short to just sit at home, alone. Kids do complicate things a bit though and they always have to come first. You didn't mention their ages or how you all get along.
I'm only 36 years young and not full of worldly experience

but maybe some of the other ladies can offer some advice.
I will be thinking of you tomorrow, I am going for a scan as well at 6:45 am and then getting my results on monday afternoon.
Let's think positive thoughts since we're both in this thing together!
Beth