I've decided to start a new tradition for New Year's Eve: From now on, I will always wake up on December 31 with a bizarre rash covering every square inch of skin from my neck down. I tried it today, and it is really a very special experience!
The on-call doctor seemed more agitated about being bothered at the Cape than about my symptoms. He asked, "Do you think you can wait till Tuesday before being seen?" I replied, "I don't know. That's why I'm calling you." Duh! He recommended I stop taking the amoxicillin (even though I've taken it before and never had a reaction), take Claritin (or Benadryl, but not both), expect the rash to get worse over the next day or two and then start getting better, and go to the ER if I experience breathing difficulties. Double duh!