Hello! Thank you for the query. Pinkish color on the toilet paper can be caused by intestine invagination (intussusception). It causes strong abdominal which can suddenly disappear if the intestine comes back to regular state. Sometimes it is very hard to diagnose it. Abdominal ultrasound during the pain should visualize it. Viral intestinal infection is also possible especially if your pain wont happen again. However if your symptoms will come back again, diagnostics should be done including abdominal ultrasound, colonoscopy, full blood work. Hope this will help. Regards.