Shana, Jeanette, yamilee, Hilary... we're ready to welcome you in August Club! You won't be left alone... you were just originally miscategorized, apparently (unless you deliver today or tomorrow).
Shana, I just really wonder if there is some darn good reason your baby wants to stay posterior and it seems uncomfortable for you to be in any position that encourages the baby to turn around. Like cord issues, not necessarily around the neck (although it could be a possibility but that's nothing to get freaked out about), but maybe cord length, where the placenta is attached to your uterus, etc. Who knows except God and your baby.
If I were you, I'd just listen to your body (although I don't like the recliner idea but if that's what you feel, then that's what you feel and I can't argue with that). Get in the positions that your body tells you to. After you do the birthing ball or the downward facing dog, etc., really talk to your baby and ask your baby to look at your uterus and see if it wouldn't be OK to turn around and face mommy's back or her side instead of looking out front. Use your hands to show your baby where you'd ideally like his/her back to be. Ask the baby to turn but give the baby permission to stay posterior if that's really what is best.
My babe is ROA. I have tried everything to turn the child to LOA, and s/he turned for a few days last week, then started being anterior, posterior, kept changing. So I gave the baby permission to go back to ROA if that was what was best. ROA it was before, and in ROA s/he is engaged now. Must be the right thing. increases the risk of a posterior birth, but I have tried everything under the sun that is noninvasive and natural, including instinctual stuff, so it's essentially out of my hands.
Hugs to you bc it's hard not to worry about that.