Well, the fluid leak stopped last night, probably around 9 or 10 pm. No labor yet, though some fits and starts. Midwife came over this morning. Vaginal strip test for amniotic fluid was negative (unsurprising based on the fact that the leak stopped about 12 hours before then). So, though I'm sure it was a fluid leak, and midwife isn't really doubting me, I'm not officially on a time line.
The real negative is that baby is now definitively posterior

So, midwife suggested a "brisk crawl around the block"

: followed by a nap, as well as parsley tea (I'd never heard of that, but she says it often starts labor). My mom drove in last night, but she can't just stay and wait, so we'll see what that turns into.
What a fascinating end of pregnancy this is turning into. At the moment I'm in pretty good spirits, but I am getting frustrated at times, worried that I'll never really go into labor.