Welcome to our community! I'm so glad you found us.
I too have had the pain, and have had the lumps (may indicate another infection - Bartonella) on my arms as well as in other places. I bruise easily due to Bart and having a really 'fair' skin color (very easily seen, even very light bruising).
The testing is not that good. It looks for antibodies produced by our immune system - but Lyme disease lowers immune function, so we not only don't test positive for the infection many times, but as Girlie and Pirouette explained, the IgM can show up any time the infection is active, no matter how long the person has had the infection. I was infected by the age of 7 and couldn't get a positive Lyme test until I had a full year of treatment - then I tested fully CDC positive for not only Lyme, but RMSF. What the testing didn't reveal is that I also had Bartonella, Babesia, Anaplasmosis and others as well.
Keep asking questions!!!
Herb only treatment for Lyme & Bart ended 12/11 - no active symptoms for 2 yrs -Herb only treatment for Babesia ended 12/12www.healingwell.com/community/default.aspx?f=30&m=2977364
Had Lyme, Bart, Babs, RMSF, Ehrlichia, Myco, Anaplasmosis, EBV
New Lyme case 8/2014 - Healed 1/31/15 - unknowingly had Asymptomatic Babs and Asymptomatic Bart, being treated now though (2/2016)