This month my period was like 2 weeks late. A couple days ago when I pooped there was blood on the toilet paper and then it happened again today, but this time afterwards my stomach started hurting. Could these be related? What could be causing the blood in my poop?

There are many reasons you would have bloody stool; hemerroids, problems in the gastrointestinal tract to name a few. The colour of the blood is also important. Rectal bleeding should only be diagnosed by a healthcare professional, please visit your doctor as soon as possible.