Any moms have pre-existing osteopenia while pregnant? Due to a severe eating disorder when I was younger, I developed…

Any moms have pre-existing osteopenia while pregnant? Due to a severe eating disorder when I was younger, I developed osteopenia (mostly in hips and low back) and didnt think anything of it because it didnt bother me much, but since being pregnant ive been having severe hip and low back pain. I am wondering if because how severe it is, if it is associated with the osteopenia and what others have done to help it. I have never been in so much pain!