My oldest daughter will be 4 at the end of September and has been potty trained for almost 2 years. We have had a few pee accidents but we've never had an issue with poop since she's been potty trained. As of today, she has pooped in her pants 4 times. Friday, Sunday, Monday and today (Tuesday). She walks outside, walks back in and there's shit in her pants. I'm at a loss. I've asked her why she's doing it and she has no answer for me. I asked if she's nervous about going to school and she says no (I know she is nervous though). I've asked if something happened that scared her on the toilet and she says no. I don't know what to do. I'm beginning to be past the point of being understanding, and I'm starting to lose my patience. How do I handle this and correct it?