Am i over exercising and what can it do to you?

I just want to know if i am over exercising. This is what i do almost every week. On sunday I play volley-ball and badminton that takes 4hrs. On monday, tuesday and wednesday I play V-ball and B-ball for 3hrs. On thursday i play v-ball, b-ball and hockey that make 5hrs of exercise. Friday i play v-ball, b-ball and v-ball league that makes 6hrs of exercise. and on saturday i play b-ball for 2hrs. Is this too much exercise and if it is. What can too much exercise do to you?