Interpretation of Hair Analysis

My 5 year old son and I recently had hair samples analysed and both samples came back positive for traces of methamphetamine. This has not only shocked and totally bewildered me, it has left me with a perplexing legal problem of an explanation for the origin of this substance.

I am definitely not a drug user and have recently been hospitalized with pnemunoia that led to my having heart complications. My son is a healthy, intelligent and bright boy and shows talant far beyond his age in sports.

Can anyone please help with some explanation as to how this substance has shown up in our hair samples? I am desperate for answers. Thank you.