Hello dear nothing to worry. Be cool and relax first. I can understand your concern. I have gone through your details. Your main problem is passing blood in the stool , with sudden onset. U r asking for treatment . For any general physician it will be little bit difficult to treat without proper history of symptoms.
Next Steps
1) take plenty of water and fruit juices. 2) take soft diet ,avoid spicy and hard food. 3) avoid taking coffee ,tea and ready made juices. 4) avoid frits like mango, apple, pappaya,and banana.
Health Tips
if does comes under control then consult me.