Sounds like it is time for a second opinion with an MD who is a member of ILADS (ilads.org). You might try emailing Turn The Corner Foundation for physician referrals... firstname.lastname@example.org
By the way, 2 bands on an IgM WesternBlot could be a CDC positive result...depending on which bands are positive.
For more info on how Lyme can affect the GI tract, check out http://thehumansideoflyme.net/viewarticle.php?aid=62
Chronic Lyme Disease, Chronic Bartonella (clinical dx only), Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, chronic Lymphopenia, etc.; G-Tube; Currently trying to wean off TPN.
Meds: Pulmicort, IV Ceftazidime, Heparin (to flush PICC line), Claritin, Domperidone, Colloidal Silver (used topically), probiotics, Milk Thistle, Ailanthus, homeopathy.