I went to a Chinese New Year's party today and gained a lot of weight, what do I do?

My cousin says, when she over eats she does not eat at all for 2 days to go back to her original weight. I'm not sure I could handle 48 hours without food. I plan on mixing coffee with lemon juice to lose weight and maybe walking in my basement tomorrow.

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It’s been 12 hours and my weight is back to normal. I had lemon juice mixed with coffee last night.
I went to a Chinese New Year's party today and gained a lot of weight, what do I do?
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