My son s girlfriend had her tonsils out the beginning of the summer, since then, she got bit by a tick and it was confirmed she had lymes decease and was treated with antibiotics, about 2 weeks ago, she had a big swollen bump behind her ear and on Friday came down with a sore throat and swollen face that she was treated for an ear infection, she is the same if not worse now, she went in to the clinic this morning and they said she has white spots with black spots in the middle, they gave her a stronger anti biotic. What would cause the black spots inside the white spots.