Thanks, mamas. I've done the slow thing before but not like this. Very weird to have three mostly similar and then a whole different experience. Though I suppose my wished-for quick labor would've been a curve ball, too!
At least my sweet boys are getting lots of opportunities to take turns rubbing my back.
It is immensely reassuring to ascertain even a modicum of progress at this point. Heading to chiro friend shortly to try to get baby to tuck his/her chin and descend. Then maybe these string ctxs will do a bit more.