Girls please help !!! Bra troubles... Thanks, much appreciated!!?

Hello... So my boobs are quite big for my age (mid teen) . I have worn the same bra for a long time . It is a fabric one and has underwire and sports one. But i want to wear a bra with padding as the one i wear is ugly and embarrasign but i dont like wearing anyother bras. how can i get used to them. If i wear a padded bra i feel like it makes my boobs bigger... i dont know what to do. I have tried like all bras!!!!