28 weeks, still breech

Is it normal for baby to still be breech at 28 weeks and some days? I know that at my 24 week appointment baby was still breech and OB said hopefully she'll turn by my next appointment (baby wouldn't show her face or anything). I went for a 4D yesterday and baby has her head tucked up under my ribs and facing my spine. Should I worry that she hasnt turned yet? Is there anything I can do to help her turn? TIA.

-I have am appointment this comkng Thursday with my OB, so Ill be asking her about it if baby is still breech.