!!ASAP WEIGHT LOSS!!

I am very comfortable in my skin, but recently I've gained a tiny bit of weight over the past few weeks. I ordered my prom dress which fit perfectly but now that I've gained a little bit of weight, it's gotten tight. My prom is April 21st (a little under a month now). Does anyone have any helpful tips or tricks besides eating healthier, drinking water, and exercising? I should add that it's mainly tighter aroubd the chest & rib area! Thank you in advanced!! 💓 *I've added some pictures below & I'm getting the top stitched up because I'm not too comfortable with that much cleavage at prom*