Lymefighter....
If you already tested positive for lyme. Then there is no reason for the spinal tap. If you have had it for 6-7 months now or longer...Then common sense is, yes....it is in your spine,brain ect.
I had a spinal tap years into being ill. It showed "nothing"....
A Lyme Doc knows that it does not necessarily have to be in blood or spinal fluid.
The bacteria likes to imbedded in brain, bone, muscle so testing for it in blood and spinal fluid is a hit and miss.
I am not for spinal taps. I was sick sick sick "er" days after....
One has to be careful that the doctor isn't having test run to fill their bill folds.
Seek out a doctor that is Lyme Literate.
You need treatment now not waiting till after a test is run.
Just MY opinion....