Chances are he may of bred her but she won't catch either..She is pretty young. Definitely tell your Vet about that breeding though. Get her fixed if that's your plan and the male too..Looks like Mika was/is scheduled to get her rabies shot on Monday and was told that will get rid of the pregnancy.
And to the person who asked big she is, she's not big. She's a Dutch Shepherd/German Shepherd/Lab mix. I'll post a photo later when I get the chance, we're cleaning a room right now. She's between 40-50 pounds.