Need advice please. My mother has been very positive for lyme 4 times now and is on her 3rd IV antibiotic treatment for 8 weeks.I asked 3 of her doctors if she was ever tested for other tick borne diseases before she went on the pic line. That was 2 weeks ago.And she was already put on the pic line. I finally get a script in the mail for blood tests for other tick borne diseases.I was wondering if the antibiotic she is now on might mask those other infections. Isn't it too late to be testing for them. Should I wait until the 8 week treatment is over before being tested. I asked the nurse these questions and she was stumpted and said she could always be retested.I think she's been messed around for 4 years now.Lyme shows up in her brain and is also in the spinal fluid.What's wrong with these doctors following up on their patients.