I'm right there with you. I'm 5'2 foot and have ALWAYS had big boobs.
At twelve, it was like BAM! I was like 4" 10" and had full C cup breasts. When I was married, I was a D cup and 5'2 and 109 lbs. Now, I'm 27, 128 lbs I'm a 36 DD (I was an F cup after I had my daughter) and I have 2 children. My boobs only got bigger when I had kids. Trust me. I've tried everything. Exercise, herbs, weight loss but my boobs don't change a bit.
I know what it's like to cry while shopping because your boobs are too big for the clothes that fit the rest of your body. I don't understand why designers forget that most women are not one size all the way down. That just because you have big boobs doesn't mean your big all over!
I suggest just trying to deal with it for a bit longer. I know that's not what you want to hear, but that's pretty much all you can do. Just wait it out. I've wanted a breast reduction for a long time. But I'm going to get a breast reduction after I'm done having kids. I don't want a reduction to ruin my breast tissue for nursing my babies.
There's pros and cons about large breasts. Just try and be thankful for what you have and that you're not an F cup like I was for awhile. Just learn to be comfortable and do your best. By some clothes you like that are a bit bigger and have them tailored down. It's added cost to clothes but it's worth it to feel better and comfortable about what I'm wearing. Hang in there girl! There are plenty of people who are soooo jealous.