are all other addons off?

I turned them back on when I tried the /oq off.

Just tried it with all the addons off except oQ and typed /oq off. It did the same thing where I was able to run around and do everything but the moment I click the oQ mini map button or turn it back on, the whole game freezes up.

i still dont have a minimap button , i downloaded 1.8.5 and still i cant use oq

you can open oqueue multiple ways.  minimap icon, score marquee, keybinding and typing /oq

if it won't pop up, then there was a problem on the load.  an error could pop up in the general chat area.

also, what region are you in? 
what does this return:  /script print(GetCVar("realmList")) ;

 

It is working now for the time being. Didn't really do anything other then not play for a while. Thanks for the fast responces tiny.