Definitely up your water intake, I'm not 100% sure, but I think they may be able to give you something to boost your amniotic fluid, and I agree, definitely cut back on cigarettes as much as possible, good luck!
You need to up your water in take as your doctor said...your going to use it a lot....that's normal...as for the smokes try cutting down on them.....but do drink as much water as possible.