I Just Received Blood Work Back (Lyme Westerm Blot) IggP30

I just received blood work back (Lyme Westerm Blot) iggP30 AB, iggP28 AB present as well as IggP18AB present . I have been treated for lyme in the past. My recent issue relates to swollen knees, therefore, I my dr chose to retest. There are other issues at hand, however, I am concerned about the above. Thank you for your assistance. Susan Montanti