My little guy was head down and flipped back over at 28 wks... I'm 30 wks and 4 days now and I'm not going to worry until 35ish wks. There are some positions that you can research that help encourage baby to flip. Good luck!
Sarah Proud WAHM mama to Connor 10/19/07, Autumn 12/19/10 , Cody 2/11/13 , Ember 5/19/15, and 2 little ones waiting for us in Heaven