Deer tick bite.

A person with Lyme can test negative over and over again. The best advice I know of is save the tick. Get in touch with the university of Massachusetts, Amherst. @tickreport.com. They will give you a case # you write that # on a baggie with the tick in it. Send it. For $60, in 3 days they will tell you if it is positive for Lyme. Money well spent!