Once a week ultrasound and "early" Induction

I went in for an ultrasound today and found out that my doctor ordered for me to have 1 a week until they decide to induce me at 39 weeks. I have polyhydromnios and he's measuring 2.5 weeks ahead but they're worried because they can't see him "practice breathing" Which can apparently mean he could have issues eating?? Does anyone have any experience with this? All lab work and ultrasounds are normal except the practice breathing but i didn't think that actually had any thing to do with them really breathing. Idk I'm just stressed now.