I cannot stress enough to find a Lyme Literate Medical Doctor (LLMD). These doctors are knowledgeable about Lyme and Lyme Treatment. DO NOT assume your General Practitioner (GP) or Primary Care Physician (PCP) know the inter-workings of Lyme and co-infections. A single round of antibiotics like Doxycycline is just not enough to treat Lyme, even if it is caught early on.
Step #1 - Find an LLMD in your area.
International Lyme and Associated Diseases Society (ILADS)
LDA Automated Doctor Referral System Click Here
Step #2 - Use a Lyme testing company like IGeneX, which is more thorough than your PCP/GP's Lyme test.
Step #3 - Start a treatment protocol that works for you. As with all health related issues, trial & error can be expected.