Please input your advices for 1st time mother. Things you feel you would want to know earlier.

Hello! When I was pregnant with my first child, no one told me I could get post-natal depression over my stretch marks, change in look and or even due to breastfeeding pain that always frustrates me. I wished someone could have told me things like this to keep me well informed and prepared. So please input your sharing, it could also be relationships with husband, mil or even colleagues and bosses.