Ok so... I have no mods installed, I reinstalled the game multiple times, and this keeps on happening.

Whenever i turn around in third person camera ( in battle stance ) my character's legs go crazy!! It happens everywhere, indoors, outdoors, it doesn't matter. No, it is not due to height differences, the legs really go crazy: sometimes they stop sometimes they shake and move to random positions... ( I have a video showing what happens but aparently i can't share it )

I can't precisely tell when this started but i noticed it 1 day ago or so.. and it's really annoying me!

Please can someone help me? As a fan of third person mode i cannot stand playing skyrim in first person and this is quite annoying even tho it only happens in battle mode.