The baby's not even here yet!

My mother is trying to tell me how to raise my baby and my baby isn't even here yet. She's trying to tell me I'm not allowed to buy anything for my baby until my baby is here and she's trying to tell me where my baby will sleep and how my baby will be raised and a lot more... It's like excuse me?! Last time I checked it was me having this baby not you. It's seriously pissing me off. Is anyone else having this problem?