Does sleeping with a bra alter boobs?

When I was still developing I use to sleep with a bra on quite often. I think they were sports bras. But now I feel like I missed out on having the “perky” boobs. They don’t magically stand up on their own all beautifully like the girls on tv do. They kinda sag and when I lay down they kinda go off to the sides. One is bigger than the other which I know can’t be the bras fault but I still dislike it. I feel like my nipples even point down sometimes. I’m 18 and they’ve been like this since I was roughly 16 but I got them when I was 11ish. They’re only roughly a high C cup to low D. So, is it my fault for sleeping in a bra when I was still..growing them?