OK, leaving aside the your XH/his XW part, I just don't get why you want to bring another child into the mix so soon.
You started seeing your BF in May 2012, when you went on the pill, having been working with him for years beforehand. As of December, you were still saying you hated children.
Somehow, sometime over Christmas you had a road-to-Damascus style conversation, and decided you had to have a child.
As of last Sunday morning, you were posting that you want a DC but your BF isn't sure so you were going to stick with the pill for the time being.
Last Sunday evening
you posted that you've thrown your pills away.
Earlier today you started not one but two threads asking if you might be pregnant already, after shagging on Monday and Tuesday nights.
FFS, slow down. Give everyone in this situation, yourself included, another few months to let the raw emotions which must still be floating around settle. Then see if you still want a baby so badly.