First of all, I'm so very sorry that you have been put through this! It's so very wrong.
Are you in a state that has Lyme laws yet? If so, you may have 'a leg to stand on', as some laws state that if a person gets negative test, the doctor must tell the patient that it does NOT mean they don't have Lyme. This could refute her claim based on the test saying you don't have Lyme.
Also, the ILADS treatment guidelines are now listed on the NGC - National Guidelines Clearinghouse, which gives ILADS validity in their assessments.
Your other option would be to contact a lawyer that is familiar with Lyme cases - or just cut your losses and move on. Moving on will result in less stress for you.
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)