I'll

this up for you Nikki...I hope you can get the answers you need
Just thought I would add...Alejandro is the same age as Jaycob....he did the same thing...it turned out that the toilet overflowed at my moms house and my sis made a HUGE deal of it and freaked out in front of him...it took him a whole year to get over it...he still does not want to go to public toilets...esp the self flushing ones.
It could be he has developed a phobia because something happend to him while in the bathroom....I found that if I forced Alejandro to go to a public bathroom he only got worse...I had to go out of my way to find a "toliet" that he would go in and then let him out of the stall before flushing it....
I hope he can tell you what happend Nikki...HugZ to the both of you.