My best friend is pregnant!

As excited for her as I am, I can't help to notice a huge change in our friendship. I'm not a parent so I don't know what pregnancy does to a woman... But I am a nanny & understand the demands & how overwhelming parenthood can feel. I'm hoping this will change but I feel as though when I speak with her my problems or concerns seem trivial or silly to her since she's like, growing new life and all. Maybe some Mom's here have a little input. I know we may grow apart in the future but for now should I chalk this odd behavior up to hormones?