My wife, 59, has had a fever between 99-101.8 for a week. She has red wells on both legs, all over them...probably 20 or more. There is no itching. Her legs feel like they are on fire from just clothes touching them, and bumping into something is very painful. She went to an urgent care center and the doctor put her on amoxycillin for a suspected sinus infection (she recently had a cold, but there is no outward sign of this infection), but she threw up after taking one, and did not replace with another antibiotic. The hives/welps problem started before she took the antibiotic.She has another doctor appt,. on Wednesday.