No! Do not decrease your water intake otherwise you'll be dehydrated! Pregnant women need at 2 litres of water to drink daily. Nausea is very common when pregnant and it's also common to feel that way when you drink water. If you can't digest plain water then go for any other drink. Orange juice, coconut water is good! Do not listen to those who say you can't drink it except 2nd or 3rd trimester. It has many benefits and help you to stay hydrated. Go read about it on this app. I drink coconut water all the way till birth. My baby is perfectly healthy! So drink up.