I have been sick with a fever, headache, body aches, and flu like feeling of fatigue. Was given doxycycline for possible Lyme disease although have not been bitten by tick to my knowledge. After three days on med fever has dissipated. But have developed a hive like rash in spots on lower back and legs and a general skin irritation. Any cloth next to body seems to worsen symptoms. Could it be from medicine?