blood in stool?

the doctor prescibed constipation syrup, diosper and procotosedyl since he said that i had constipation, anal fissures, piles. The doctor said to see the outcome after one week. During the medication period of one week. I ate fruits and vegetables everyday, and passed motion, NO blood was in the stool. i didn’t consume fruits and vegetables on two days, and when i passed motion today, there was blood. i am very scare now.