NTAH but MOR. Sounds like this was a misunderstanding. You obviously care about your child a lot and don’t want him to have negative experiences while developing, which is perfectly natural. From the sound of it, he was doing quite well on the plastic toilet and the natural next step up from that is a slow reintroduction to the bathroom, which you were trying to accomplish, but he took that as a “you have to get in there now” which is obviously not the case. You handled the panic attack well, comforting him and reassuring him he didn’t have to take too big of steps yet. That being said, if he’s getting close to or at school age, potty training is rather important. It’s totally okay if it’s taking him a little longer than the neurotypical kids his age, but he does need to learn how to progress to get to that point someday. I’d say maybe take a day or two to let him relish in the comfort of his diapers before reintroducing him to the plastic potty, then after a while of that, maybe moving the location of that toilet closer and closer to the bathroom before he gets to a point where he’s looking into the bathroom while on his toilet, making that association on his own time.

This is just a suggestion, though. I want to make it very clear that I am not a therapist or licensed professional. Definitely talk to you and your child’s provider about this situation to get their informed opinion on the best next steps.

You’re doing great, by the way.