I have a bump behind left ear, I went to the doc due to a sinus infection, and was told it was a swollen lymph node. It has now been there almost 2 months, it does not hurt , but does not seem to be going away either. I have been having moments of dizziness, when I move my head too quickly, almost like vertigo. What is this, is it normal? When should I worry? What can I do to speed up the healing process?