How many days before period do you get emotional?

I want my period to come now because it is due while I am away. It would be a week early if it came now. I have gotten acne breakout last weekend. I was emotional and lazy today. How many days after getting emotional does your period come for you and how do I get it faster?
Update: Also I've been drinking shitloads of water to clear up acne.... My pee is toilet water colour at the moment!..... Does this help make it faster?
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