My daughter has just started her period within the last 6 months. Along with her period came a regression in potty training. She stays dry at school and overnight. During the day at home she would rather let off a little urine in her pants and continue playing or whatever she’s doing. It’s so frustrating really to be honest. I had her completely trained at 3yrs old and had not had more than a very occasional accident all these years. What I’ve done so far is to be really clear that she is not to be wetting her pants. I kept her in her regular clothes and just bought lots of extras. I have been setting a timer for every hour and a half for her to go to the bathroom. I really hope she’ll get over this.