Back pain with posture

Body: 

This is my first post. I'm pretty sure I have a stage 2 cystocele. I was dx with one initially immediately following birth 10 years ago but it's been mild until recently. Now I feel it and can see it. I've ordered Christine's book and have been trying to adopt the posture but my lower back HURTS! Alot! I had already been holding my shoulders/ribs properly for 2 years or so after learning them from a pt but I'm used to tucking my butt and pulling my navel in. But trying to push my butt out, it makes my back hurt. Also, I've heard good things about t-tapp for prolapse but that also institutes a tucked butt.

Any help would be greatly appreciated.

some degree of back pain (usually upper back) when starting to stand in this posture is common. you're using muscles you haven't used in a very long time, so you're going to feel it.

Its very unlikely that you were already holding your upper body in the same way as described as 'wholewoman' posture if you were tucking your bottom. its very difficult to do just half the posture.
also, I'd stop trying to 'push my butt out' and instead focus on tilting your pelvis. it doesn't matter really, how far your butt sticks out. what matters is the orientation of the pelvic girdle..if you form two 'c's with your hands, and then put them together so that the right thumb is tip to tip with the left, and the right fingers with the left, you have a 'pelvis' with a tucked bum. now tip your thumbs slightly so that they are below the plane of the fingers and you are facing a nutated, or anteriorly rotated, pelvis. this is what you want.
to figure out if your pelvis (the real one) is rotated, place your hands on your hips as though your teenager came in waay past curfew. your thumbs are behind you, your fingers on a bony prominence (called asis, or anterior superior iliac spine). now, keeping your hands on your hips, tilt your pelvis so that your fingers are below the plane of your thumbs and there ya go. nutation.
this is usually accompanied by an increase in the curve of the lower back and 'butt sticking out' but not always is this dramatic. the point of this pelvic tilt, is to give the pelvic organs a real 'floor', which is not the vaginal opening, but the pubic symphysis. remember the 'pelvis' made of your hands, thumb and fingers? the 'floor' is the two thumbs.
another point of this pelvic orientation is to give your pelvic organs a stable position within the pelvis (forward of the vagina, rather than above)

don't know about t-tapp but I do remember it being discussed here before. try typing it into the search box