So please, wish me luck and pray that it works, I so want to be able to have a child (or children, maybe twins, never know) to love and care for...
One thing I've learned is that I think prayer works best when you leave that kind of stuff to God. I used to order him around, do this God, do that, restore my marriage, but I think God ultimately knows what's best for us.
I think at some level, maybe deep-down you maybe do hope for a fairy-tale ending, that you and your H will be brought together over a baby, as you think it caused some of your problems. But every marriage has problems, babies bring their share of stress also, and many spouses don't find an OP. I think you mentioned OW about 5 or 6 times in your post and I find that a bit troubling.
Worst case scenario, you are seeing yourself as a single mom. But one thing I've found so tough in this is dealing continuously b/c of my kids with X and the OW. I love my kids, but if I hadn't had them it would have saved me a lot of grief and stress.
Have you talked to an IC about this? Another thing I am thinking is you mentioned your H's family as a source of support for you as a single mom. If at some point, you divorce, I know that changed for me, and I've seen that in other cases here, where the in-laws withdraw their support and rally around the WAS.
