My 3 y/o is acting strangely

Okay so I'm bathing my 3y/o today, and he starts to appear very sad. So I ask him if he's sad, he nods his head yes and I ask Why. And he looks at me and then points behind me. I, then, ask if he's afraid and he says no. This sent chills up my back but I remained calm. His other parent and I are not together but they see him every other week. Recently, he's been acting out at daycare. Shaking with temper tantrums and then sobbing. He's also antisocial. via /r/Parenting http://ift.tt/29dv6ja