We've been potty training 10 days. For the 1st 4 days my son (juts under 3) did really well. Then he did 1 day at nursery well. 10 days in he now will hold the wee and poo and refuse to do it on the potty, then doing it in his trousers. I'm at a bit of a loss what to do... anyone had this? Any tips? Do I just keep going?