to lose or not to lose?

i'm having some major mixed feelings about dropping weight.
obviously i want to get thin, i want to do these two weeks to see how low i can get in that amount of time. but i'm also nervous about losing because the dress im getting is a strapless i'm already pretty flat chested and i'm scared i'll lose my boobs more than anything else in these two weeks resulting in the dress no longer fitting. my mom got me the dress tonight and its cost more than what she'd usually spend so it has to look amazing. if it doesn't fit right when the dance roles around i'll feel terrible but wanna be thin!
since im still eating i probably wont lose that much....is what i'm telling myself and hopefully its true.