My understanding of Lyme disease is that most standard blood tests for it are only 25% reliable., so it's quite possible that you got an "all clewar" from a blood test.
I have heard that IGen-X is very good, but that the authority is a lab in Germany that is the best in the world: http://www.arminlabs.com/…/tick-borne-diseases/lyme-borreliosis.
My HBOT therapy (which is the only reliable way that I know of to get rid of chronic Lyme disease is about half way through now and my PN symptoms have lessened dramatically (in my case, I am trying to rule out Diabetic PN because it came on so suddenly after being diagnosed Type-II diabetic, and progressed from my feet to my waist in less than a year. The HBOT therapy has driven down to my calves, so far.
I think the intense antibiotics are only effective if you catch the Lyme disease early on (within about 48 hours of the bite).. Hope this helps.