Nerve pain and small lump in donor site - 2 weeks post-op.

Hi I am two weeks post op now fue , the constant dull pain is subsiding in the donor site, however this week I started to have sharp nerve pain that comes and goes... also I have a small lump in the donor site .. I went to the dr she said the skin looks good and no signs of infection my question is , what is the lump?.. prob dime size maybe irritated tissue ?... how long is this nerve pain gonna last ?... like I said it's not constant it comes and goes but it's sharp ...