We are currently trying to potty train DD, who is 2.5. We started casually at the beginning of the year and she was great and then we had some upheaval with school and a new baby so we stopped for a while. Started again two weeks ago and for the first five days she did really well, no accidents at all and was telling us before she had to go. Since then, she doesn't seem able to tell when she needs to go and wees on the floor unless we take her regularly (which she fights like a demon).

Is it normal to have a regression without any stressors?