Hello,
i think I understand what your on about, if you wish to lose weight it isn't wise to do anything such as throwning up or anything, I don't know if you have done this before.
Seriously, the best and most benefiting way to lose weight is to burn off more than you eat, how to do this? At more healthy, cut out crap such as full fat items, sugary drinks and sweets, switch to health foodstuffs take supplements and excersise. When you nourish your body and then work it off, you will lose weight quite quickly and you will feel alot better about yourself too.
Its ahrd work but far more rewarding than most other methods of weight loss.
Don't diet...Diets don't work, eat less crap, eat more healthy eat around 1500 cals a day and excersise and you will be sorted.
I don't mean to sound harsh, just some input.