I went to the bathroom and I had unusual difficulty passing stool. When it finally passed there was a pink, mucus like substance around it and two hours later a very small amount leaked out. I am a 17 year old male in good health, height and weight. My only health issue is that I recently finished chemo therapy for hodgkins lymphoma cancer. I haven't eaten a lot of meat and I have stayed well hydrated, consuming about four or five bottles of water a day. I have never engaged in anal sex. What is this secretion? Is it blood? Should I be worried?