Breastfed baby and Diarrhea?

Katie • My name is Kate and I just gave birth to our beautiful daughter February 17th 2016. She is our world and we couldn`t feel anymore blessed❤ I am currently pregnant with our July 2018 baby!

So I’m not sure how to tell if she has diarrhea or not? She’s been eating cereal and teething and I thought she might have a ear infection but it’s hard to say with all that’s going on plus I started my period and I’m not sure if that has any effect or not. She has her 6 month apt tomorrow anyway so they will check her ears but I’m just wondering how you tell if it’s normal poop vs Diarrhea...sorry I know TMI