Hi. My 3 Year Old Daughter Has Hit Out In

Hi. My 3 year old daughter has hit out in a rash on her legs and it is spreading all over. She has been to the dr and he thought she maybe first had chicken pox. Then I looked up on google and read about a staph infection, remembering she went for her foot checkup at the hospital because she was born with clubfeet and had to walk barefoot on the floor for her orthopedic dr to check her progress , she had blisters under her feet at the time of the check up. This rash has been on her body from about 13 January 2016. She has had a course of antibiotics because we noticed that her nails have got dents in them! Please help, we don't know what to do anymore.