I had this experience first time around when my son was 8 months old
and cut his top teeth,  it was hell.  I was so close to weaning as it
seemed to go on and on. The pain eventually subsided after about 3
weeks.  He wasn't biting, it was just the pressure.  Now three years
later, I still have the scars on my areola to prove it.  Unfortunatey
nothing I did seemed to help.  I even tried a nipple shield, but he
was to old and just kept grabbing it.  Needless to say, I was
terrified when my daugher started cutting her top teeth, but it
didn't happen again, thank goodness.
Val in Busselton, Western Australia
RN RM IBCLC