Fishy baby breath?

My daughter is 8 months old and last week I started noticing a fishy smell coming from her mouth & spit. At first it was just in the mornings that I would notice it so I figured it was because I hadn’t brushed her teeth yet, but it started becoming more prominent throughout the day even after brushing. She isn’t showing any other symptoms besides the fishy smell. I called her pediatrician and they prescribed reflux medication. She isn’t showing any signs of having reflux, so I was wondering if anyone else has seen this in their baby? Any advice?