Breech boy

I'm currently 33 weeks (due May 23). I'm a FTM and am 95% positive that my little guy is breech. I can feel a bulge poke out on the top right (just beneath my right ribs) that feels like his head. The top right seems to be his favorite spot to hang out. I currently walk about 45 minutes per day, and sit/bounce around on the birthing ball for about an hour per day. Is there anything else I can do to help him flip? And should I be concerned?