Help please...

I already have dry skin, but the last couple weeks have been torture, esp for my face/scalp. I have to apply moisturizer several times a day, my lips are nearly constantly chapped, and I have mild dandruff that dandruff shampoo isn't curing. Help, anyone? And yes, I'm drinking tons of water, and I haven't been taking my prenatals b/c they make me sick. Any other advice??