Update on IgA deficiency blood test

I received the IgA blood test results. I am not sure how to interpret the results. Although my results are in the normal reference range, infections (skin, gut, respiratory, or renal infections) can increase IgA levels. Since it is known that I had an infection (possibly in all of the areas), I do not really know if I have a low IgA level or not. In other words, it could be a false-negative test result.