Should I fire babysitter or no?

She watches my 2 daughters age 2 and 3. Today my 2 year old had a massive blow out and she noticed at the end of her shift. (Only 3 hours). She then puts the clothes back on my daughter that had shit on it and didn’t mention to tell me until I found poop all over my fucking couch I’m furious to say the least. I txt her a picture of it and say “is their a reason why you didn’t clean this up” she says sorry I tried to clean it up with wet wipes and it didn’t come out and said she forgot to tell me and that next time show her where the stuff is to clean it Uhm wtf? Now I’m just questioning her basic mental state of why would you put clothes back on my daughter then fail to tell me about the couch. It’s pretty basic things. Am I being too harsh? I feel like that shouldn’t be taken lightly and don’t really know what to do givin this the first babysitter I’ve hired. Please let me know what you ladies think I should do I. This situation