Anyone ever deal with this? Please!

Im 35 weeks plus a few days, and all the sudden my amniotic fluid is low. They did a NST and baby was active and great, and in the ultrasound he was doing practice breathing.

They sent me home and told me to drink a ton of water and come back tomorrow (24 hours later) for a repeat NST and ultrasound.

Im trying not to worry or google because im sure theres a ton of negative situations that will pop up.

Has anyones fluid gone back up from drinking a bunch?? Any insight into how it went for you?