I Get Highly Depressed And Feel Like Crying On Small

I get highly depressed and feel like crying on small tiings, I feel lack of patience and get anger on small things. I'm not permanently sad, but whenever a new incident take place which is not acceptable to me, i feel extremely sad and hopeless. I also feel physically weak and feel dizziness if anything sad happen. And then can not concentrate on work. Am I suffering from any psychological disorder?