Didn't you ask the same question a few weeks ago? It is not miraclously going to be a different answer lol The answer is still the same.
How much have you to lose Mamas girl? There is no other way on earth to lose that much weight, and that quickly than waterfasting, apart from dry fasting, which i think you will need to know what you're doing to try that.
How long have you gone in the past? I've been doing intermittent fasting, i find that easier for me at the moment. Do 36hrs a week say.