It will at least look at your stool under a microscope. Plus it’s painless. Also your doctor can check labs on you which might show if your losing blood you shouldn’t be.
Then a colonoscopy I would want. The prep cleans you out but your asleep and the test takes 20 minutes, that’s it. It is pretty simple. That’s a start. You need to get tests done to rule out it’s not something simple like a hemorrhoid. They bleed and are not always external. They can be inside your rectum and you won’t see them or feel them. You need piece of mind. It’s important to good health. Tell you doctor everything and allow him or her to do something. Don’t leave there without a lab slip for yourself and some stool tests. You can do this.