Thanks, everyone! I should have joined this site a year ago.
1000Daisies - I really don't know for sure. At two months post partum, I came down with mysterious symptoms out of the blue - peripheral neuropathy, twitching, light sensitivity, migrating joint pain. I also nursed him during that time until he was 10 months old. I had a known tick bite when he was 10 months old, which is what tipped me off to Lyme (and made me wonder if I somehow already had it) and that's when I stopped nursing.
Currently, I just have the symptoms I mentioned to go off of. Thanks for sharing your experience and for the information on Advanced Labs - I might have to check that out!