Lunar orbit precession issue

If the moon orbits the earth every 28 days, the effect of gravity would cause tremendous precession on the night sky. Every 14 days the sky would move forward and every 14 days it would move backwards. Because the masses of the objects are such the precession would be more than noticeable. The two massive objects would be in jeopardy of collision.

I know how the moon moves with the earth. I just need to get it out. I have an idea on how to describe it.

I will have it out in a couple of days.