Hello and thank you for your question,
What you are describing sounds like undigested food particles rather then blood. Blood in the stool would be either bright red (mostly you can see it on the toilet paper as you wipe or mixed in with the stool) or, the stool can be black (which means there is digested blood coming from the stomach).
Pinkish color is most likely secondary to something you ate. As long as there is no bright red blood coming out, you do not need to be concerned.
Please feel free to follow-up with any other questions you might have. I would be happy to assist you further.
If you are satisfied with the answer, please do click 'Accept' button so that I may get credit for my work.
Best wishes and good luck,