Testing is unreliable. Many who were tested in the past received negative results only to find their symptoms progress until they do test positive! Sometimes they find that receiving antibiotics for another issue causes symptoms to resolve-a good clue in determining whether a bacterial infection (borrelia) has caused your problems. Also of note, there are a host of other bacterial infections that are Lyme sidekicks and can be present even if your Lyme test hasn't turned positive. Babesia is one of them.