As everyone as said - Monistat is safe while bfing. I had recurring yeast infections while pg with my dd. I used LOTS of Monistat then. My dd was actually born with a yeast infection, then I got a yeast infection in my breasts. YIKES! I had to take Diflucan while continuing to bf, cuz Monistat wasn't helping, and my dd had to take something (it's been awhile), and I had to rub something on my breasts. It was all medically O.K.
Our homeopath said my dd's dx is prone to yeast. Interesting!