I Was On Antibiotics For Pneumonia (Z-pak And Augmentin) And

I was on antibiotics for pneumonia (Z-pak and Augmentin) and developed a horrible rash over 50% of my body. My doctor told me I had a systemic Candida problem and gave me Nystatin cream. It hasn't worked and the rash keeps coming back in different areas. Right now it is on my low back. It is raised and itches. HELP!