Also, when shooting do you feel rushed to just shoot the photo without getting everything straight or in the frame correctly due to not wanting to annoy the subject, especially when she is pregnant haha?
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YES. I used to feel this all the time, and only recently began to realize I was doing it, and fix it! The more models I've shot with, the more comfortable I've become with really *being* the photographer. You're the one taking the picture, you're in charge of creating the image and thus you need to direct the model in a way that creates the most flattering image. Just be confident, and give her good feedback and she won't get annoyed