TypeA: It's not going to change to "not pregnant" lol. You're pregnant, dear! Personally, I would keep testing anyways just so I could keep seeing the BFP over and over again.
Allika: are all the dogs okay? My dog is all bark and no bite (literally) but boy does she have a crazy attitude! She freaks out and acts like she wants to beat up the other dogs but cowers once they get close so I know the embarrassment. I've learned a lot of tips from the lady from It's Me Or the Dog on Animal Planet. Maybe she has tips on the website?