Vitamin D drops?

Hannah • ❤️👫3-28-12 💍 2-21-16 👰🏻🤵🏼4-29-16 🌲🏔💒3-11-17 👶🏼8-7-17

My daughter is 10 days old and EBF, the pedi recommended her starting vitamin D drops but I'm skeptical about giving her anything extra. Does anyone have any insight? I've read the side effects for getting too much vitamin D and do not want to subject her to those side effects if it's unneeded.