Character Issues

My character is broken. I am a gnome mage. I was travelling through the ironforge tunnel to stormwind on follow with another party member. After I went through the portal or whatever you call it, I loaded into stormwind and ever since then I cannot mount in some areas of cities. Whenever i click mount it does the animation and cast time but when the amount should appear it just fizzles out. It happens in certain parts of stormwind but not others it is quite weird. I don't know if this has affected other parts of the charcter but when I cast spells it feels choppy and my character turns awkwardly (this part might just be me being a noob).

I've cleared the cache. I submitted 2 support tickets and the GMs said come here so I do not know where else to go to fix this issue.