Lord knows I am not too swift with medical issues BUT I can assure you that even though I have colon cancer the MDs are not too concerned when I have blood in my stool. I find it disconcerting but each time it has happened I have noted it and then brought it to the attention of the Doctors (whom I trust, by the way) and I have been assured and reassured that my overall test results indicate that I am holding my own and "not" to get freaked about when I see blood occasionally.
Do I know what your symptom means? Heck, no. But I do know that you should not let your imagination got racing toward the worst indicators. I'll keep you in my thoughts and prayers. Hugs DDD