Lisa,
I too had similar symptoms,, some hearing loss although not much , balance issues, some headaches in the beginning, that was 2008, then annual MRIs showed small growth until May of 2011,, it had grown from approx 1 cm to 2.8cm at surgery 4 wks ago. Watch the tongue issues because I developed numbness on the tip of my tongue,, like from burning it with hot coffee, and slight tingling on side of face with AN,, and it ended up the tumor had grown into the facial nerve,, compromising it.. but my tumor also was in the CPA area having grown out of the IAC and was pressing on the brainstem..
I agree with Clarice in that I think an opinion from House, which I also did ,, is useful .. Dr Slattery was my contact there and he suggested surgery but in 2010 was "ok" with w&w.. then in 2011, he indicated I needed to move forward with surgery, radiation was out of the question as it was pressing on brain stem by then,, I did not have it out there, but did move forward,
So just letting you know tongue issue can be related and an indicator that tumor may be pressing on that nerve .. good luck to you ,,, many people on here have been in your shoes and it is a difficult time for sure....