I just brought skyrim a few days ago and started a new character and am trying to complete the quest "bleak falls barrow". I climb the mountain to get to the entrance and then when i get there, the entrance is floating in midair about 30 metres away from me and the steps used to get to the entrance aren't there (like someones cut a massive peice of land from my game)> When i climb what steps are actually there It says I cannopt go this way and I get stuck and cannot move in any way. I can send my companions up but not me. I experianced a similar problem in whiterun where, when I entered through the main gate there were no houses. Just floating windows and doors. The same thing with the castle main entrance (luckily the dungeons door was floating low enough for me to interact with). Is this a problem with just my world or is it the copy of the game.

What should I do? and How do i fix it?