How to keep baby head down?

Is there a way to ensure i can keep baby head down? I'm 38 weeks and 2 days and shes been breech up until today! She is in perfect birth position so I don't want her to flip again. Shes got tons of fluid in there and she's tiny (6 pounds based off measurements)so she has a ton of room to move which makes me even more anxious! Ob said he wanted to induce me this week if she was head down at this ultrasound so that she doesn't have a chance to flip again! Any tips would be appreciated!!