HELP!!!!!!URGENT😭

eve family i'm freaking out. I've read through other people's questions and everyone's so nice and supportive, I hope I can get the same. I recently started realizing that im getting stretch marks on my breasts, ive been wondering is it because of my push up bra?I wear it a lot. I'm getting stretch marks on my the sides of my ass too...does that mean it's getting bigger?how do I get rid of it?