I hate my big ! What do I do?

Im 17 yrs old and all of sudden my s grew like crazy! I wouldn't really mind them if it wasnt for my mom. I always have to wear at least 2 layers to hide my .. and sometimes there still seems like a ! Its so annoying! And buying a bathing suit is even worse. Everything makes me look like im posing for a playboy magazine or something and it drives my mom crazy. And during the winter my mom makes me wear a sports bra when i wear TURTLENECKS because she says my s still look big. Its driving me crazy! And yet my friends are always like "I wish my were like yours, im so jealous!" What do I do?? Even clothes that aren't suppossed to look revealing somehow look revealing on me. And it drives my mom crazy which eventually drives ME crazy!! I'm tired of going into 20 stores before I can find a bathing suit my mom approves of! And i wish that one day I could go to the beach without wearing a shirt over bcuz my mom doesnt want her friends to "see me"