Girls, dehydration on my period?

Becxa
I started my period yesterday. Last night I went to sleep about 2 hours earlier than usual. I have Chronic Insomnia to where I wake up at least three times during the night, so when 11 o'clock rolled around I wasn't too surprised to be awake. The odd thing was, I had this longing for water, so I got up, poured myself a glass, downed the water, and went back to sleep. About an hour later I woke up again, this time my mouth was dry, and my tounge felt like sand paper, so I stumbled out of bed, got the glass, filled it up again, and drank it, then went back to sleep. This happened two other times that night and I woke up in the morning with the same feeling. I've been known to be pretty lax in my water intake, but I've never been dehydrated before, and I wondered if it was somehow triggered by my period, and if it was, was it normal?
Girls, dehydration on my period?
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