the thought of returning to work is making me sick :/
Ahh, it is so hard. I was usually in denial at the point you are at, with a few weeks left. It sounds like you've had a rough time with a fussy baby, and you just want to relax and enjoy her.
I'm assuming you can't take any more leave time or you'd be doing that. It is so great that your mom can take care of her. I think people who are related tend to have the same sort of physical gestures and strategies, so I bet your mom's care will feel to some extent similar as yours (rocking, swaying motions).
The nursing/pumping stuff can be a challenge at first, but it does get to be a routine that works out for most, and it is not forever!
Enjoy these sweet moments when you are together. It will work out as she gets a little older and you adapt to your new routine.
As far as pumping goes, I'm sure you'll get it figured out pretty quick. I'm sorry about your hours making it hard, have you considered trying to move your DD's bedtime? Not sure if that would work better for you. As far as milestones go, I know this can be very hard, but even if you SAH you can miss milestones too, so try not to feel too bad about that. The first time you see crawling/walking/etc. will still be the first time for you and it is still exciting!
So glad your Mom can care for her. It won't be the same as you and DH, but having family care for her is as close as you can get, so that's wonderful. And your DD will be able to get to know your Mom really well and vice versa, so that's nice for the two of them as well.
for you again!