Weeks to months

Ok so this May sound real stupid but okay

My baby was born APRIL 3rd 2019 today is 4weeks which is equal to month Right?

My apps says she four weeks and going based off an actual calendar she’s 4weeks and doctors said she was a month and a girl is arguing me down saying she not a month till Friday (the 3rd of this month) which does make since but it’s confusing tf out of me cus Ik I’m not stupid all Ik is she’s four weeks but can someone explain this to me 😂😂

Sn: i understand that some months there are 4weeks and some 5 but it’s just crazy and confusing