I think you need to realize that as a new mom you will worry about things that you never even noticed before - that just comes with the territory, and with the hormones, and the changes in life.

Your dog is not who has changed, and deep down you know that. Just give her love and attention as much as normal, and relax.

When my sis-in-law was pregnant, one of her friends asked my brother if they were going to get rid of their puppy, and he replied "No, in fact, if we didn't have a dog, I'd probably go get one now! Kids and dogs belong together!"