Please forget about extreme weight loss in such a short time.
It is not only unsustainable-
you will likely gain more
weight back
after a while-
it is also very risky!!!
You can compromise your digestion, your G/I, nervous system, cognitive function, endocrine/hormonal system, etc.
Be wise and choose a life-long plan for health and fitness which will work.
If you are interested in the latter, please post again.
Don't let your short-term desires cloud your judgement.