Hi Dragonfly- sounds like you might have been gearing up to O and it was too early. It could also be that your temps fluctuated for other reasons. I've noticed that a couple of things make my temps go up- drinking red wine, exercising in the afternoon, and having an extra blanket. Anyway, the CM is definitely the best extra info to go by, so sounds like it's right around the corner!
Leetie, hope AF stays far, far away!