Question about my breasts?!

First off I'd like to start by saying I'm obviously a girl, but I have a medical condition that makes me gain weight fast and makes it hard to lose weight and it gives me a hormone imbalance so I was wondering if it would affect the following.

I am a bit overweight, I have B cup boobs. I'm fifteen. I have about a two inch space between my boobs, and when they're out of my bra for just a few seconds they get kind of pointy or not round kind of like an overweight males breasts, they look just like man boobs and it's gross. I am trying to lose weight and I'm taking birth control to get all of the estrogen I need. Is that going to help my boobs form correctly? Also are there any workouts I could do to make them round and to get that small gap between my boobs like normal ones? I'm so self conscious about it cause everyone else, even with small breasts has that gap in between their breasts where you can't feel any fat, just bone, ladies if you know what I'm talking about.