Mycoplasma Pneumoniae

I have been taking doxyi and azith for three weeks now and just got some blood test results in the mail that show my IgGi Mycoplasma Pneumoniae level over 1K. The normal range is less than 100. The IgM test for Mycoplasma Pneumoniae is in the normal range though. I have a phone appt in a few days with the physician that ordered the test but would anyone care to enlighten me? Is this what they call a co-infection?