I had low fluid all through DS2 at 38 weeks I was induced. In hind sight I wouldnt let them do that again- with out a scan on the day.
All through that pregnancy I was told to drink a lot of water, everyday 10 glasses and to eat chinese dates- stew them with water and sugar and drink the soup/ eat the dates, everyday (perhaps a local chinese grocery will have these?)
There are measurements for the fluid- did they tell you what you are? in the last tri anywhere from 5-25cm is normal.
What else did dr tell you? Do you go back in a week for another scan or tests etc?