I don't have enough Amniotic Fluid, is there anything i can do to increase my Amniotic Fluid Levels?

I am 28weeks pregnant, I went the docter on thursday and he detected that i do not have enough amniotic fluid, is there anything i can do to increase my amniotic fluid? I am drinking lots of water and I am eating healthy foods and snacks throughout the day. Please any advise is welcome!