Bothered

So a while ago, I told my school psychologist something and I told him it actually made no sense that I got mad because of that. I mean, I understood why I wasn't happy about it, but getting mad was... Not exactly necessary, you know. But yesterday I read it again and I felt terrible again, and this morning I nearly cried about it. Honestly, why do I even feel THAT bad about it? Why can't I handle that? It doesn't even make any sense that I get so sad about such a thing.