Thank you so much for your responses!
Good news, I think Roxie is going to be ok

Roxie's temp was normal this morning and she is no longer shivering. I didn't take her in to the vet but I did call and talk to him for a bit. He thinks the heat could have been her milk coming in and the resulting engorgement. Now that I think of it, I remember having that same radiating heat after having my children.. engorgement really isn't a pleasant thing! Her teats are very full and hard, poor thing. She seems a lot happier now that these biewer boys are around, too.. less need to be around me for every second of the day!
I will continue to keep a watchful eye on her.
Vwitscher, I am sorry about your girl's c section complications. That is just horrible! I was so close to taking Roxie in for a c-sec and now I wish I had. Who knows though, maybe that could have turned out disastrous as well, so I'm trying not to bear myself up about it. I won't ever be having another litter from Roxie. If I ever do have another litter in the future (doubtful because the other dogs are boys and won't be whelping, lol) I'll be a nervous wreck the entire time. So no, I just don't think breeding is for me!
Thank you Rose! Roxie seems to be herself this morning. I think I'm "projecting" human emotions, onto her. I keep thinking she is so sad, like I would be if I had a stillborn. When in reality she never even got a chance to realize her role as a mommy. I don't even know if she knows she's supposed to have a puppy right now. The whole situation is sad but she is getting over it a lot quicker than I am!