I drank blood like water, and now my internal dryness has gotten insanely severe.

Lately, perhaps due to spring fatigue, I've been so sleepy that I've been practically living on 3 to 4 cups of iced Americano a day. Since I didn't drink a single sip of water and only drank coffee, I think all the moisture in my body has been drained out due to its diuretic effect. This morning, when I washed my face and applied toner, my skin felt as brittle as paper and so dry it felt like it was going to crack. I slathered on moisturizer as if I were going to empty an entire jar, but the inner tightness just won't go away. Starting today, I'm cutting out coffee completely and starting a challenge to drink 2 liters of bottled water no matter what. My skin feels like it's going to die from drying out.