Bob, that sounds peculiar. I am not an MD & don't want to sound alarmist but a visit to your physician may be in order.
Lately, a 1 time prophylactic dose of Doxycycline w/in 24 hrs of a bite is prescribed.
Myself, I was on a few regimens of it which caused it's own long lasting problems one of which was an allergic reaction-it's not to be taken lightly. Actual symptoms of Lyme can take a while to present, but why wait?