Hi Margaret, I can only tell you what happend to me after my surgery.  I also could hear or thought I was hearing right after surgery.  I could talk on a cell phone and understand what was being said on my an ear.  I did lose my hearing in my an ear a few weeks after I was home from the hospital.  It was very hard to accept this and I was told the same thing, it usually does not come back.  It slowly left.  I don't know why.  My doctor told me after my surgery that he made it 80% through my surgery when my hearing was lost, but even after I came home I knew I could still hear a little.  It was hard, but I could hear and make out the words, But that isn't what happened.  After the hearing test it was evident that I was hearing from my good ear.  I do hope your's comes back.  I just wanted to let you know my experience and what  my outcome was.  I will be thinking of you, BB