The ELISA test is notoriously inaccurate for Lyme, especially chronic Lyme. You want the Western Blot IgM and IgG tests done by a reputable Lyme-Literate laboratory such as IGeneX in CA (see www.igenex.com for details). It would also be good if you aren't already doing so to find an ILADS-Lyme-Literate MD, as they are more aware of the limitations of the tests and how to diagnose clinically instead of relying on tests to tell them what's going on.
Check out the thread at the top of the forum titled, "The Basics - Newbies, check this out!" for more info, also.
Chronic Lyme Disease, Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, Pancytopenia, chronic malabsorption/malnutrition, etc.; G-Tube; Currently TPN-dependent.
Meds: Zofran, Pulmicort, Heparin (to flush PICC line), Claritin, Colloidal Silver (used topically), IV Milk Thistle, probiotics.