Mbos are you saying that you have been on Forteo for a year but your bone density went lower? I was on Forteo for the full 2 years and my bone density went lower. They say that the Forteo's benefit is usually seen toward the end of the 2 years so maybe you will see an improvement eventually.
Endocrinologists deal in hormones so I would imagine that doctor would check your hormones. Of course Foreto is a Parathyroid Hormone.