Just got the callback from Nursey P.
The doctor wants me to still go for the beta tomorrow morning, but also wants me to come in on Wednesday for an ultrasound and an exam (I'll be one of the first patients he sees on Wednesday). I asked her if what I'm experiencing is normal, or if there was a problem, and she said that the doctor didn't that it was unusual, but he wanted to make sure that there's nothing funky going on in the whoo-ha region, or, if there's a baby really in there.
I feel so much better about this, I don't know why. It's like I truly feel, deep in my heart, that my growing suspicion is about to be validated.
Hopefully I'm right.