Huge thank you to everyone for your good wishes and thoughts, it really has been a huge help to read such kind things and all the support and advice has been a big help already.
First Update - I just called the vet to check in and apparently she's bright as a button this morning. She's not too fussed about eating but they say that's normal after such a long surgery. She's baring a little weight on her left leg but nothing her right yet. I feel like that's a great improvement already considering she was literally just dragging her lower half behind her this time yesterday.
She does have "deep pain" which they say is a good thing, and she's almost able to pee on her own. She needs a little help to get started off and then she goes by herself, which again they say is a good sign. They're letting us go and visit her this afternoon, and bring her some of her things and some treats. I'm terrified that visiting her might upset her because she is so attached to me (and my mom) and that it might somehow hamper her recovery but I miss her so much I need to see her and the vets seemed pleased to get us over to her.
I'll update with any more news later on once I know a bit more and have seen her for myself.
Thanks again all! Your kindness really has been a huge help to get me through this first night.