My breastfed baby’s poop is stinky- normal?

I just sent a message to his pediatrician as well, but for the past couple days my baby’s poop has smelled BAD. He still is having regular poops, the are the right colors and consistency and he doesn’t seem to be in pain when he poops. But why does his poop smell so bad all of a sudden? It used to be almost odorless or have that not too stinky breastmilk poop smell. Could it be my diet? He gets pumped milk now during the day when I’m at work- could there be something wrong with my pumped milk? Help!