Thanks guys, I really appreciate it! :)
It looks like I caught it right in time yesterday because after getting 1.5g's of bute yesterday, the swelling was basically totally down today. I think she's still in pain because if I take her flymask off to check her eyes, she basically does her best to get her head back into the flymask but she's on the right path.
I was able to finally get in contact with the vet this morning (apparently there were lots of emergencies yesterday so I'm not miffed anymore, haha) and she agreed with what I did yesterday (dosing L up on bute) and we came up with a plan for what I should do in the future (2g's of bute the first day, 1g/day for 4 more days, give them a heads up on the first day, etc), so yay for that.
On the bummer hand, I believe Lacey may have lost that final little bit of sight she had had in right eye with this episode.
Today the farrier came to do her hooves and while she was her usual cool self about that, she acted shocked and did her little "Why HELLO there, buddy!!" nicker when he finished with Lady (who was on Lacey's right side) and walked back around behind Lacey to her left side.
But, if she did lose that sight, I'm not overly bummed, in that she had just enough sight for things seen through that eye to be unreasonably scary. So it might actually be nice for her to not have that eye seeing "scary" stuff constantly.
I guess that's the unfortunate breaks of the game...
Anyway, thanks! :)