Two Bad Weekends in a Row...what gives

Guess we were do in for some bad times withe Miss Lilly..as she has been a fairly healthy baby, and not had to go to the doctor for much of anything except her "well baby visit." We were on day #8 of the antibiotics for her ear infection, when I noticed a very faint rash on her trunk. I just figured it was a bit of heat rash from putting too many blankets on her at night. But as the day continued on, the rash got worse....what to do on a Friday night with a baby who has a rash that is spreading....call the doctor on call at the hospital (yes, it's a small town). He told us if it's worse in the morning, then call and come in to his office. Well, by the morning it was much worse...the red bumps had gotten darker, and bigger, and spread to her face, arms, legs....basically everywhere. So in we went, and were just told she is probably allergic to amoxicillin ( just like her Daddy). Needless to say, it was a rough weekend with a bumpy baby who could not get comfortable ever!! Hope she improves soon!!