I am having such a hard time

So I am 14, and I am having an awful time because of my boobs. I wear bras that are 3 sizes too small. My mom always says we are going to buy some, but we haven't. When I run they bounce up and down, so I don't run fast. Even my sports bras drag down too low. Both kinds of bras give me side boob. My dresses included give me side boob. I want to get a super cute bikini, but I have scars under my boobs, and in between them, but I have no clue where they came from. So then people ask where they came from, but even I don't have an answer. I even bump into my boobs. At some point in my life I have considered doing breast reduction surgery. I just need advice please.

Update: I got new bras today. Interestingly enough I ended up being 2 letters too small.