Confused about Conception

I'm confused about whether or not my does are bred. Let's see, Xana was bred over the course of four days starting about November 12th. Iris was bred on the 17th, and Flopsy, if she was bred at all, was bred a few days later than that. 

It's far too early for them to be back in heat if they were not pregnant. Well, Xana possibly. It's been 16 days since she was bred. But way too early for Iris. However, they both look sort of like they might be. Xana has a puffy pink vulva, just like when she actually is in heat. And Iris hasa little bit of yellowish goo stringing down from her vulva and a messy tail. Flopsy is the only one who looks totally ordinary and boring under there. 

If they aren't pregnant, I have one more try on Xana and two more on Iris and Flopsy paid for, but why wouldn't they be? The buck is proven; Iris is proven, and Xana and Flopsy are both nice healthy does, no reason to suspect they wouldn't be fertile.

Aargh. Goats.