My son turned 3 in June this year. He was fully potty trained by 2 year 10 months, even dry at night. He was speaking well. Then hit a week ago he started wetting himself, babbling, acting up. He's regressed massively and I have no idea on the trigger. He had 1 unsettled night then boom has been like this. Literally like a light switch has gone. Anyone else had similar?