Yes, they do actually do a pregnancy test for dogs! A lot of vets I called had never even heard of it, which is odd because over half of them around here do it!
I have decided to go with the ultrasound because it is going to cost the same either way. I think the price is pretty reasonable- $35. I am willing to spend that simply because she took me on a roller coaster last time I bred her because she had a false pregnancy. I just don't wanna go through that again!