GG - I really relate to an undercurrent in your post, about not trusting yourself to get below a certain weight. When I started again last year, I didn't even really pick a goal weight. It seemed too abstract, too unreal. It's not just that I couldn't imagine myself at a lower weight than I'd been since childhood - it's that there was a very real trust deficit in myself.
I never did figure out how to overcome it, except to believe that the longer I stay at a low weight, the more I'll see it's true -- I really can weigh less. I've learned, and I've got a ton of knowledge and experience now. I can trust myself. If you can throw yourself into the WL and just trust that the perspective will come, I think it's OK that you can't fully see yourself at goal yet. Don't try. Just do what you know you need to do.
Of course, I haven't made it to goal yet either, so what do I know.

I got burnt out, took a 6 month diet break, and now can't seem to muster the will to get back on. But the fact that I'm still in the 140s (err, these days, just barely) has been incredible for making me believe in myself. And I realized there is no real end goal to be sprinting towards. I want to go lower still, but it's OK if it's not right now -- the effort never ends.
Edit - after posting, I remembered that today's the day, and you probably have other things on your mind! Hope your delivery goes smoothly and that you have as easy a recovery as possible! Good luck!