Lee, I have to agree with the others. I would (as gently as you can) explain to her that you feel that working on your relationship with her, plus her medical issues, should take precedence and then you can tackle having another child.

I'm sure she will see it as a power play. In a way, it is. But it is one that should be made. Bringing a life into the world is serious business! So do whatever you have to do and put up with whatever fallout happens, but don't make a dumb decision just because you want her to be happy.

GOOD LUCK, I sympathize with you so much Lee.
I hope she starts to feel better and gets into a good groove soon.

Hugs!