That "cotton head" or "wonky" feeling is pretty common along with tinnitus. I have found that being near loud sound or drinking to much caffeine has a definite impact on my tinnitus. If I keep my caffeine intake to a minimum my tinnitus is barely noticeable.
As for the "cotton or wonky head", I personally found that weather (barometric) changes were the primary cause for me. I'm coming up to 15 months post Gamma Knife and the wonky head issues are becoming far less. Getting enough rest and monitoring your stress levels is also key. The more tired and stressed the more I noticed my symptoms. Darkness is another issue. Due to the effect of the AN on my balance system, walking or driving at night last year was more challenging. For me and others, it just takes time. This winter I'm already noticing a huge improvement over last year. Life is good, wonky days are rare and balance issues are greatly improved.
Cathie.