Ay, possible talaga yan! A few of us had babies na cephalic pa throughout pregnancy tapos biglang breech towards the end, one of my mum friends had almost the same situation around 37-38 weeks kaya nag-panic siya, but her OB said it can still happen because babies have space pa to move around. Since you're already at 37 weeks, I'd definitely talk to your doctor ASAP kung anong options available for you (pwede pa kaya i-turn, or if c-section na ang best) because every case is different and your OB knows your full picture better than anyone online!