Uy mamsh, congrats sa pregnancy! Listen, any changes sa amniotic fluid levels closer to delivery deserve a quick check-in with your OB, better safe than sorry, lalo na first time mo. Pero don't worry too much, maraming reasons why this happens at 37 weeks, at alam ng doctor mo ang history mo from your ultrasounds kaya siya best person to reassure you. A few of my mum friends experienced similar things towards the end and lahat okay lang, pero definitely confirm with your doc sa next appointment or call agad if you're anxious, that's what they're there for! You've got this, mama!