Hi and it’s good they are doing the scan. You probably need that colonoscopy as well and possibly an endoscopy if nothing on Ct scan.
It can be Irritable bowel, impacting of stool even though you pass stool, an infection and a million other things as well. Our digestive system is many organs and it’s complicated. A GREAT Gastroenterologist is key.
You at least have a starting point with this test. If they thought it was an emergency I would have thought they would have booked immediately and they didn’t. Be careful, maybe stay eating simple things and google the white diet for colon, stomach issues till the test. The white diet is simply that, eat white food like white bread and white rice. Eat things easy to digest. Until this test beware of what you eat. Looking at your stool it looks like you ate things with seeds. Stay away from anything with seeds till after the visit. They don’t digest well if you have digestive issues.
If test is soon you can do the white diet. I wish you like and hope you post how you are.
Blessings