Ay, ang libot talaga ng babies dito! One of my mum friends had the same thing, breech, then normal, then breech ulit around that time, and honestly by month 8 baby settled na sa tamang position kaya don't worry too much. What you're doing with the talking, music, and the light exercises is actually good, pero I'd really suggest bringing this up sa OB mo next check-up para makita niya kung may specific exercises or positions na better for your case, kasi alam nila exactly what your baby needs. Maraming babies pa ang nagflip flip pa by 8-9 months, so fingers crossed for you!