I was prescribed Macrobid for a UTI, however within 6 hours of taking the first dose, I developed symptoms that are more like a kidney infection : pain on my lower back left side, and a rash of raised red bumps on the backs of my thighs. I've read that Macrobid is not the right medication for a kidney infection. Am I taking the right thing. Also, I am breastfeeding a 19 month old part time. How dangerous is it to breastfeed while on Macrobid?