Hello, i m a member of the canadian forces, and the other day i participated in a battle fitness test, a very stressful 13 km ruck march with 50 lbs of kit, and since than, my stool has been very hard, and accompanied by blood, usually in streaks, or in crevaces of the stool, should i be concerned? What could cause this? Anal Fissure, or what is the likely hood me having hemoroids?