My stool is hard in the morning and diarrhea in the evening but everyday the same ritual and sometimes just diarrheaish what can it be? colon cancer?

Not likely: Colon cancer is always a possibility but is rather uncommon in your age group. Your symptoms suggest an irritable bowel like condition. Sometimes diet may play a role and a full review of your dietary habits including chewing gum, energy drinks, favorite foods and rituals, recreational drugs, etc will be required before making any further recommendations. Talk to your doc about your worries.