Welcome to motherhood! As a mom of 5, I can assure you that
IT WAS A DREAM, so relax. I had some of the most horrible dreams when my kids were babies, especially with my first. A lot of these dreams are due to 1. a lack of sleep, 2. concern and fears for the baby and 3. (this is most often with the 1st child) resentment towards the baby. Yes, That's right! I said resentment towards the baby. You have had a complete and total disruption and upheaval in your life by having a baby. It's normal, relax, and feel free to come here and vent.
