Low amniotic fluid *advice please*

Twice a week I have non stress tests done to make sure my baby’s healthy and before these tests the doctors always check my baby’s amniotic fluid level. 5 weeks ago it was about 4.9 and every time I go in the levels drop. They’ve told me the normal range is from 8-2 and I was fine, however, on Friday it was 2.7. The doctor said it was fine and not to worry but I’m honestly scared. I heard drinking more fluids would help so I’ve been drinking as much as possible but it hasn’t helped.

My next ob appointment isn’t until next Tuesday so on Friday I called the labor and delivery line and they told me the levels might be low because my baby could be big. Has anyone been thru this? What should I or can I do? I’m 38 weeks so I’m full term now but just thinking about him not having enough fluid scares me