Hi Catflower - Every day is different. Even 3 months post op you'll have good days and bad. Yes, overall you should be getting better, but I wouldn't be concerned about being sleepy on some days more than others. Just chalk it up to major surgery, and it's going to take awhile for you to completely regain your energy. If you had translab, and are deaf in one ear now, that is also an adjustment. As you try to do more, you might find that you are sleepier. Just take care of yourself. One year after surgery I taught a week long class to 5th grade students for 4 hours a day. My head hurt, and I was extremely tired every day. Take a closer look at what you are doing, and also if there is any other stressful things going on in your life that might contribute to your tiredness. Getting used to the new you can take awhile. Take baby steps, and it's okay to rest now and then -- even if it's 3-4 months post-op. And my balance (now a year post-op) is fine, but if I get tired, I notice I have some problems with balance. So your sleepiness and balance issues may be going hand in hand. As far as the heavy headed feeling, I remember coming home from surgery feeling like someone stuck a washcloth in my head, and I had this pressure and weird heavy feeling on the AN side. If this is what you are experiencing, I think this is probably normal. Not fun, but normal. I'm not a doctor though, so if you are still concerned, I'd call your doctor.
Thinking of you, and sending well wishes.