Hemorrhoids Bloody Stool Bloody Stool.please Read And Answer?

Bloody stool.please read and answer? - hemorrhoids bloody stool

27 Clock I woke up the other night with stomach pains went into the bathroom and my shit was bloody. If the pain does not leave, went to the emergency room. Who has the blood and the doctor told me I had a few stacks on the side of my anus, but blood. They sent me home and told me to follow up with my doctor. I went into the bathroom and now my shit was more .. red What could this be ??????
I have heartburn that could have something to do with it?