Oiii ada posteriornya jugak, I understand lah the worry! Honestly at 39 weeks ada still a bit of time, a few of my mum friends had baby posterior sampai last minute, and some pusing on their own during labour itself, so don't lose hope yet. Try the usual tricks like hands-and-knees position, crawling, or even bouncing on the ball, tapi most important is check with your doctor or midwife this week to see if they're concerned or if induction might be needed. Some babies are just stubborn lah haha, tapi doc will advise best on your situation! Sending you strength for the final countdown