don't take a LabCorp Elisa negative as proof you don't have lime! (and don't let a doc tell you you don't have lyme based on a neg Elisa)
you can print the Igenex requisition online and take it to your doc and explain you are concerned with the false negatives from other labs.
my GP originally shock his head and said I didn't have lyme. Upon much insistence and his eye rolling he was shocked when it came back positive
Another doc also laughed and told me I didn't have lyme.
Also co-infections are possible, and hard to test. the tests for babesia for example are only sensitive to a couple of subspecies, and there are something like 200 subspecies. a good LLMD will treat based on symptoms.