You cannot safely change your size in two weeks. That's not a judgement, it's FACT. You cannot afford to be sick. Eliminate ALL added salt, sugar, grain, and dairy. Eat salad greens, a small amount of olive oil, berries, egg whites, and small portions of nuts. You will lose some weight, but your focus must be on having the dress altered. NO ONE HAS SAID ANYTHING NASTY TO YOU. You made a mistake, and you must rectify your mistake now. If you consider the facts of your situation to be "putting you down" you should seek your answers for yourself and see how that works out for you. It's time for you to consider how hurt your cousin will be if you DON'T tell her.