Reply to 1 week diet!

Hi guys

Now i know short fast diets are not to good for you and are not a long term idea, i know i need to get in better shape in the long run. Problem is my sister is getting married next friday and i just tried on my suit that i have for special occasions now its been about 9 months since i last wore it and the trouser are pretty tight and the jacket is really streching when i do up the buttons

Now there are so many "diets detoxs and fads" out there and im trying stear well clear of them i cant do a crash diet as we got a 4 week old new born and i need my energy levels plus got to work during days, but is there some kinda of semi diet i can do that will see me drops a few pounds maybe a waste size or 2 within a week??

Help people Thanks