OK first of all you need to know that the tests you have mentioed, which were identified have basically nothing to do with your cholesterol, the statins, what you eat or what you do.
Immunoglobulins (Ig)- a large family of proteins, also known
, providing a first-line of defense that protects the body from foreign pathogens (virus, germs, parasites, etc.).
These are protein produced in your blood which can-if elevated-be signs of a disease. You have some idea already because you were told it might be a "reactive or inflammatory "process.
These are divided into five major classes:
IgG, IgM, IgA, IgE, and IgD."
(see this site at your leisure)
IGm when elevated can be a sign of a disease called Waldenstroms macroglobulinemia--.
Did they do a urine test as well for antibodies?
However these antibodies may be temporarily elevated and we may never know why.
But at any rate these tests should be repeated (as you were told)