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Hello and welcome to JustAnswer,
Let me try to help. There really is only one way to find out if this color change that goes throughout the stool is from blood and it is to get a hemoccult test.... A simple stool test that will tell right away if this is blood or not. As mentioned above, if blood is in the stomach it gets digested and turns the stool black.... if the bleeding is between the stomach and the farthest down part of the large intesting you COULD indeed have a maroon stool from bleeding into the intestin, usually small or first part of the large intesting. If the bleeding is closure to the anus then the blood appears red. So the easy answer is to visit an urgent care or your physician, take in a small sample of this stool in a plastic container and have the hemoccult test run. It takes less than 5 minutes to get the result. Then when it is negative you can relax. I hope this helps, but there is not way to tell you based on your description whether this is caused by blood or not.