My baby has been going back and forth in the position. Until the last week - when it decided the right is most comfy. I do sometimes worry - but really also trust that my baby knows what is the best way to enter my pelvis. I do have conversations that go something like this:
"Usually it is best to be in the left, but you know best. Also try to keep your hands around your chest and head tucked during labor... "
I hope the baby is listening.
Sometimes the baby does end up posterior... so I do try to sit upright and not slouch, but slouching is so comfy! I try to sleep on my left more than right side, but I need to rotate to be comfortable.
I also try, but am not always successful at doing some pelvic rocks/cat-cow as well as the spinning babies inversion daily. But really it's a few times a week.
I took a class from Gail, of the Spinning Babies website - and she is wonderful. I learned a lot. I do think that the exercises can help some people. But it also isn't helpful to stress about it either - in my opinion.