last thing i did was fight the guy for companions quest then everything went to crap.
Let me guess - you used some kind of magic or enchanted weapon on him.
Deliberately glitching to level up your destruction or did you just completely miss the part where he tells you not to use any kind of magic in the fight?
Either way, there's only a couple options - either reload a save from before you started fighting him and do it without magic, or punch him unarmed a whole bunch (typically at least a many times as you hit him with magic) until things get back to normal.