What stores should i get my clothes from?

hey, i'm a 15 year old girl who loves clothes. my favorite store used to be abercrombie, but lately i've been getting too old for that store and it's just been too expensive. so now i'm interested in stores more like Garage and Forever 21. I love these store because they have great fashion, it's very stylish and somewhat sophisticated.i love clothes that look like designer clothing or just look really nice :) i like to dress all out with jewelry and cute clothes, but one problem that i have with these stores is i have a very small body and most of these store's clothing doesn't fit me :( so does anyone know a few stores that i should get my clothes from, that aren't too expensive? thankyou!!