Now you're asking tough questions!
Band 41 is a tricky one. Dr. C's Western blot explanation says that band 41 is specific to spirochetes. So, if you have syphillys (sp) or gum disease OR Lyme, it will show up on Band 41.
Did you have any "IND", or just all negatives (other than 41)
As for whether or not it is Lyme...some people have a completely negative test, but still have Lyme disease. It is a clinical diagnosis. At this point, I would still recommed seeing an LLMD, as they would be able to look at your symptoms, and decide whether you could be clinically diagnosed.