Your concern makes a whole lot of sense!!! I don't blame you a bit for being concerned, I would be!! I would be bold enough when calling to ask if the doc considers diagnosing clinically.
If not, I would consider that to be a sign that the doc doesn't really understand the rate of false negatives the current test produce & that doc possibly would be capable of treating you properly. I would actually find another doc to go to if that were the case - but that's just me.
Another suggest, if I may? Read through the thread at the top of the forum titled, "New to Lyme?" - there you will find instructions on how to detox. By starting now, you will have a head start on your healing. They are as easy as soaking in Epsom Salts & peroxide for up to 20 minutes!