It's very commendable of you to take him back while he's still young enough to adjust quickly to a new home. I'm sorry it didn't work as quickly as you were hoping. Maybe some day in the future you can try again. For now please, do feel you have to leave just because Scotch is going back. This is a wonderful forum to learn all about yorkies and I think it'd be great for you when you need a mommy break from the children
Prayers that your delivery goes very well and smoothly. ((((((Hugs))))))) for thinking of Scotch's needs before your own!