Dry mouth???

I am a rare person who drinks almost the recommended amount of water a day. I love water! I don't drink soda or any thing else except coffee for a treat once or twice a week. Every since I found out I was pregnant I feel like I'm dehydrated more judging by the color of my urine and dry mouth in the morning. Anyone else feel this way?? I'm only 4.5 weeks and I'm heathy. I don't have crazy thirst or anything like that. I'm curious if anyone notice they need more water while pregnant. My doctor told me you do but man this is crazy!