Are you on antibiotics?
I never had hair loss as a symptom of lyme and I have been sick for 11 years. I'm telling you this because hair loss is listed as a lyme symptom, but not all of us get that particular symptom.
I went on mycobutin/azithromycin last May to treat bartonella and my white blood cell count dropped to dangerous levels twice. I was taken off the mycobutin because of that. Two months later my hair began to fall out rapidly. I lost about 30 - 40% of my hair.
My dermatologist and lyme doctor both said that the antibiotic is what caused it. When my doctor took me off mycobutin/azithromycin she put me on Biaxin. The hair loss was slower on Biaxin but still continued. My doctor has taken me off all antibiotics for now to give my body a chance to recooperate from it.
Once I got off antibiotics the shedding slowed down to "normal" shedding for me but it will take me at least a year for my scalp to heal up and for the hair to grow back. It has been a horrible experience.