Colonoscopy scared

So I have been having a change in my bowel moments since July. I talked to a doctor then and they didn’t do anything but this time I saved a picture and they are sending me for a colonoscopy. I don’t have any blood in my stool or pain but it’s thin like and I feel like I have pressure in my rectum. I am so bloody worried I have colon cancer. They are skipping the blood work and X-ray and right to the colonoscopy. Please someone give me some encouraging words I feel like I know it’s cancer or something not good 🥺 has anyone else had thin like poops. I have 4 kids and I am so scared of something bad happening and dying.