Diarrhea in baby girl since birth

Lily Rose

My baby girl is 10 weeks 4 days. Since birth she’s always pooping. I mean ALWAYS. Even when I am changing she poops. It is watery sometimes. Because of this rashes appeared in the cute little butt. Its heart breaking. Really worried about this. She’s exclusively breast fed. Anyone experienced or heard anything like this. please share your solution with me😢