Well, if you've not given it to him on breaks in the summer before without it triggering things, I'm not certain it would suddenly start now. Definitely check with the doc though.

I know with my son, a lot of times when his mood tanks there is something triggering it at school. Either kids making fun of him, or when he was younger he'd be in trouble at school all the time because of symptoms of his disorder. He'd think he was a horrible kid and internalize it. He also has an intellectual disability, so I'm constantly dealing with him thinking he is stupid.