I realized I've been posting a lot of updates on my Twitter but I hadn't posted any updates here.

Reagan is out of surgery and back home. The vet ended up extracting 5 teeth [4 on the abscessed side and one on the other side] as well as cleaning the teeth he didn't remove. She has stitches in her gums and the outside of her cheek, but she's got her painkillers and antibiotics and she's been very active and eating normally. :) She should heal up within the next month.

The stitches in her cheek are being taken out next week. The stitches in her mouth are the kind that dissolve naturally.

Thanks for all your help, everyone!