My DS regressed when babe came along and I also tried everything under the sun so massive hugs

What finally did it for DS was a reward system of Smarties (which he picked out himself) everytime he went to the toilet and that worked.

No idea why it worked but it worked.

Seen she keeps going back and forth between being trained and not have you asked for a medical opinion such as UTI/constipation? Constipation really affect urinary control.

Good luck.