It's always miserable to find out that what we though was cured was really just hiding! You might find this ongoing Mayo Connect discussion about Lyme disease to be helpful. Lori (@loribmt) has provided some helpful resources.
https://connect.mayoclinic.org/discussion/lyme-disease-thank-you-all/?pg=2#comment-757398
Also helpful is this group dedicated to helping people deal with the ongoing symptoms of chronic Lyme disease.
https://www.lymedisease.org/lyme-basics/lyme-disease/chronic-lyme-disease/
Good luck with your continued treatment. It took my niece several years to completely recover, and though she has been symptom free for a while now, she is always watchful in case the symptoms come back.
Sue