DD toilet trained last summer, was 2.3, dry day and night within a few days. Between then and a week ago she had maybe one accident a month.
Over the past 10 days she's been having 2-4 accidents a day at nursery, maybe one a day at home. Still dry overnight for the most part. She's not constipated, she doesn't have a UTI. Nursery say she's not upset, she's certainly happy going in everyday and seems happy when we collect. She's fine out and about, and when we ask she just says she did a wee in her knickers.
I have no idea what to do.