We fought some silver hand and bandits outside of the keep, but when I actually enter the keep, Lydia Dissapears. I go back outside and she's gone. Rolled back to Breezehome, not there. Any had this problem?

And yes, she was with me before I entered the keep.

Bump

So what happen was: I entered the back door, and for some reason she was transported to the front door of the keep, and I had to go find her. GLITCH for you Bethesda!