Me too. My IgM Western Blot is positive, but IgG Western Blot is negative (IGeneX and CDC). My LLND (plus 2 LLMD's and another LLND) says I have Lyme. And when I'm on abx, the pain significantly decreases. Was told by an ID doctor that it was a false positive and "cross-reactive" with some other infection. He couldn't tell me what infection though...and I don't test positive for any other infections (including coinfections) except Lyme.
Yeah, I've been laughed out of doctors' offices before too, and also been told I'm a nut job, diagnosed with all sorts of stuff that never made sense to me, given loads of immune suppressing meds (all but Prednisone made me sicker; Prednisone used to help but it stopped working), told I was "difficult" and told there was nothing they could do for me. It was out of desperation that I finally went to the Naturopath I now see, and by dumb luck, he happened to be Lyme-Literate and when the IGeneX test came back positive, I finally knew what was wrong all these years (the diagnosis "felt" right to me...unlike all the other diagnoses I'd been given prior).