Boyfriend was annoyed at work and said in anger "God is punishing me for being a bad person" (he's not religious). I let it go. This happened 5 days ago.

He's going through a divorce right now (they broke up 1 year ago) and changing jobs. I can't help but think he's feeling bad about the divorce. He keeps saying it's nothing specific its just an overall feeling and gets super defensive and angry when I asked today.

Should I really push for an answer? Let it go heat of the moment? Am I over thinking?! I've never been in this situation.