<human>: Hi guys, so, as you can guess I really want to lose weight. But the thing is I'm having a lot of trouble. I wouldn't be in such a rush and be so panicky but I have my prom in two months and I've bought my prom dress, however it's way too small, I mean, I'm overweight. The bottom nearly fits my waist but the top is separate and it's a corset, and there's no way it's going round me. I'm panicking because my mum has said that I'm not getting another one, because being the person I am when I tried the dress on at first it fit at the front, looked great, but at the back? So I promised I'd lose weight. But, a year ago I tried to lose weight on this diet certified by a major health care brand, it worked great, first week, lost 5lb, second, another 5, but then it screwed up my system, and landed me in hospital for a week. Ever since then I've never really trusted diets. Trust me, I've tried, I've tried so many times to keep on track, to keep on the diet. But no matter what I do I cant seem to do it. What I need is to lose inches off of my stomach and chest, and I was just wondering if you could give me any tips, I have a two month deadline and I need to lose like, two maybe three dress sizes. I regret not starting earlier. I hate myself for it. But I don't want to miss prom :( please help me! I'm going to hammer these next two months!

Condense the text into a few key points
<bot>: need to lose two - three dress sizes in the next two months for prom, otherwise I can't go, advice on losing inches?