My stool is often covered with bright red blood, and I feel fatigued. Why?

Hi doctor,

I am 23 years old with a weight of 169 pounds and a height of six feet. Before 40 days, I saw some blood coming out while passing stools. After that, I saw them for the next two days and then my problem went away. Before a week, I noticed some small amount of blood again in my stool. Yesterday night, I saw my stool covered with bright red blood. I am constantly noticing mucus or jelly-type substance in my stool. I am worried about the dark grey liquid seen often in my stool. I feel fatigued but I do not have any pain anywhere in my body. I do not have any pain even while passing stools. But my urge to poop has increased lately.