I'm so sorry that I threw out a crisis and then left it hanging.
Friends on FB may have seen that she rallied a bit after five seizures that day, but she also had tons of things stack up against her at once, in a flurry of terrible luck. She was able to walk for a bit at first, but then not so well, and now to the point she wouldn't be able to stand without help. Up until now, the big things we were dealing with were seizures and owies; two nights ago, she coughed for an hour, and we nearly went to the ER (as soon as they said we could come in, she fell asleep and didn't cough again—so they said to hang tight for now). I told the story to rehab vet and she suggested I get chest Xrays ASAP—and my awesome vet, on her day off, managed to carve out time and staff to make it happen. Because she has had a weird history of having seizures at their clinic, she arranged everything so that she would spend as little time as possible inside—so we measured her in the car, quickly carried her into the room that was all set up, took a couple of shots, and we were done. Unfortunately, the x-rays showed a bunch of fluid around right side of her body and some lung stuff going on; the cause of fluid is unknown/not visible, but likely a mass or something like that. It's perhaps exacerbated by the fact that she was lying on one side (the "good" side) for a couple of weeks with minimal turning/standing—even though I knew she needed to, she just couldn't do it without going into massive pain and by then I just wanted her to be comfortable.
My vet came over to my house to tell me the bad news, and at that point (before seeing the University's radiologist's consult) was thinking today or tomorrow might be appropriate time to let her go. Even though I knew it would be soon, it was just so sudden. A couple of hours later, my vet came over again with the radiologist's report and some Orbax; she said it's still bad, but they thought it could also be an "odd pneumonia"—so their recommendation was to "treat what's treatable" and see if it brings her any comfort and possibly avert imminent crisis. She's coughed a few times when moved around (because I carry her), but no big fits since. Although we were considering Sunday, she brought 4 days' worth of pills just in case...so we're checking in a couple of times a day to see how she's doing. My vet thinks we will know; I really hope so.
Thanks for listening, you guys. I feel like MP and I are merged into some wild fuzzy animal and I don't know how we could ever be physically apart.