Trackman:
Fatigue and/or a need for daily naps is not at all uncommon for recovering AN patients.
Between the effects of the growing AN that forced your body to try and compensate for the loss of hearing (and collateral balance input) and the trauma of a long surgery - under anesthesia - your system is simply drained. Add to that, your body is furiously trying to heal itself. All that makes for little excess energy to spare and so, as you try to function normally, you simply lack the reserves to do so without fatigue and a concomitant need for rest. This is usually not the sign of a problem but an indication of a body that has been highly taxed and is simply regenerating, which saps strength you would normally have. It will pass. We're not physicians so if you're really worried, you could always ask your doctor about this. I expect he or she would assure you that its relatively normal after a serious surgery.
As
Kmentioned, we all heal differently. You may just need a bit longer. Don't fight it or be overly concerned but
do get the rest your body tells you it needs. Eventually, you'll be back to normal because
'Time Heals'. 
Jim
