DS is 26 months and we’ve just started potty training. At the end of day 1 after a few accidents, DS just marched over and peed in the potty totally unprompted. He did the same for all his wees on day 2 and at the beginning of day 3. But now he has stopped doing that and is just having accidents again and not even attempting the potty or telling us he needs to go. Are we back at square 1??