So I'm 13 and a girl, I get blood on the toilet paper after I wipe kinda often.. It's not usually much. But it only happens if I don't drink enough water. It never happens when I'm drinking a lot of water and eating vegetables. I already asked my mom (who has a PHD in nursing) and she said it was just constipation. It also only happens if I have to kinda force it out. Is this normal?