It probably seems really daft; but what I do when I am upset is listen to Melissa Etheridge's album 'Breakdown' which is pretty much what it says on the tin. It is about your whole world falling apart (in her case because of a breakup). For me, the songs are really emotional and I completely feel what she is talking about. Then, I put on her next album 'Skin' which is about her getting over her breakdown. It is all about moving on, even though what happened was painful. Listening to the two in succession helps me put things into prospective – and genuinely makes me feel better about whatever is going on in my life.
I think you will find that whatever it is people do when something bad happens to them will seem daft to other people, but it doesn’t matter what other people think. Everyone deals with pain and frustration differently, and that's what makes us unique. I think you should do whatever you think your character would naturally; It doesn’t matter if other people thing it's strange, or unrealistic, because someone everyone is a bit strange.