Several days ago a half inch sized round, raised sore appeared fairly quickly on my thigh while working in my garden, and it had a round area about 2 inches wide radiating out and surrounding it....I m taking doxycycline per a physicians advice, but he had no idea what caused this..it is day 4, and the round raised area has flattened, but this area surrounding it has gotten bigger, looks and feels bruised, is still hot and sore...what did i get????? Thanks, C B