I've had that same problem for a verrryy loonnngg time!! My friend sorta saw me struggle so she recommended a thelittlebracompany bra. They specialize in petite bras so i'm sure you're a good candidate! (They also carry your size

)
Let me say it's the most comfortable I have ever worn. I'm a 28 B as well.. and I've never had a bra fit me so well.
It is amazing. Not only is it fitting, comfortable, and preettyy, there's a perfect amount of padding which gave me that fuller look.

I
definitely recommend one of their bras. I know they sell many of their bras in lingerie boutiques, but I got mine on their online store.
http://www.thelittlebracompany.com Tell me how it goes!! It seriously has changed mee!! I hope you it does the same for you
