Help! How can you lose weight fast! (:?

Im 13, and im going on an important trip with some friends for stuco! We are going to go swimming and im scared what they will think of me in a swim suit. im not fat just not twizzler skinny. i have some chub. i really am nervous about my thighs to! they are huge because i got a geto ! this trip is the trip of the year and i dont want people to be grossed out by what i look like! i need some surgestion how to lose some tummy and thigh fat in like 2 weeks! just get rid of some atleast! (: