Severe anger can cause bodily harm in some ways, it put's alot of stress on your body and mind. I don't think it's unusually to feel tense/slight pain in the chest and stomach after a severe anger outburst. Especially if it's prolonged or serious.
On a side note, if English is your primary language, I would suggest visiting a doctor, you should be able to see one for very cheap through your local county (If you're in the USA.). The inability to form coherent sentences is a symptom of a serious disorder, I'm just concerned is all, and I wish you well.
"We know nothing at all. All our knowledge is but the knowledge of schoolchildren. The real nature of things we shall never know." - Albert Einstein