Help my pygmy goat is changing!?

She was exposed to a male goat before I got her and they said it was once and only for a few hours. About 6-8 weeks ago I noticed her gaining weight and she got two very small bags with two inch nipples hanging. No change in the utters that I can see, meaning not getting bigger. She stays in her house a lot of the day but will always come out for food. She is my pet so she was not going to be bred. I am not sure if she is pregnant or not. Can someone tell me is it normal for Pygmy goats to have utters that has never had a kidd? Or is it normal for them and is a sign of matuity?