Slightly low fluid levels at 37weeks?

Malory

Anyone have on the low end of normal fluid levels late in pregnancy? I had a placental abruption with my last pregnancy so my doctor ordered a biophysical profile ultrasound 2x a week until I deliver to keep an eye on things. Today was my first one and she said that my fluid levels were at 9cm when normal is from 10-25cm so she doesn’t want to see it get any lower and wants to keep an eye on it and if I have any pain or cramping to go to the hospital. I’ve already been having tons of cramping and contractions that aren’t frequent that she knows about. I feel like baby is on the verge of coming this week but is this something to be concerned about? Was anything done if you had the same problem? She did say that babys movement and growth look good so she’s not concerned there.