Dehydration City

Shawndria • Surprise baby #3 IS HERE!
I drink a minimum of 64 oz of water daily. Why am I so dehydrated at bedtime, yet I'm getting up to urinate every two to three hours? 
I also drink carbonated water, iced tea, juice.. None of that is incorporated into my daily minimum. 
Is anyone else feeling like their body thinks it wants to emulate the Sahara desert?