welcome to the forum
sounds strange
so, standard questions for now:
- do you have any mods installed?
- is the newest patch installed?
- does that happen in one particular region/interior/cell or...everywhere?
- you probably didn't change any *.ini settings, right?
in any case, upload a manual (not auto- or quick-) save,
located in
Documents\My Games\Skyrim\Saves
two files, *.ess and*.skse; they need to be packed as *.rar (or something like that)
-> with those, other users will see if they can recreate the problem
