This is probably just going to make you more irritable but lack of physical activity can contribute to your feelings. However, there are a lot of other factors too.

Anyway, the best way to get over it is to accept that you're angry and go through the emotion, whatever it takes! Do not in any case, blame yourself for this emotion, you're human and entitled to it. I'm not advocating physical violence but if you suppress your feeling, it will get worse, believe me.