http://www.ncbi.nlm.nih.gov/pubmed/20508824
"The evidence continues to mount that Chronic Lyme Disease (CLD) exists and must be addressed by the medical community if solutions are to be found. Four National Institutes of Health (NIH) trials validated the existence and severity of CLD. Despite the evidence, there are physicians who continue to deny the existence and severity of CLD, which can hinder efforts to find a solution..."
I know there are plenty of sites out there to the contrary, but this info from PubMed might be helpful to take in to docs who won't consider chronic lyme.