You really shouldn’t care about what the other girls are doing. If they want to wear a push up bra let them wear since their parents allows it.
From my opinion it’s okay to have “one” push up bra since you’re 14. But for you to have multiple ones, that’s not appropriate. Having multiple push up bra is what some older woman have to make them look more attractive to other men. As a 14 year old, your main attraction should not be your breast.
My final say for you is that you can have ONE but don’t make a fuss about your breasts size and how they look because I bet you will still be beautiful with or without your push up bra.
The only natural way to increase breasts size is to wait for maturity. Breasts keep growing with you until around 21years old.
teenage girls actually have to go through a lot of bullshit and the fact that it’s considered cool to make fun of them for being upset or emotional is kind of gross