Barbas is a large gray hunting dog found along the road outside Falkreath. He is Clavicus Vile's companion, a supernatural creature that usually takes the form of a dog. Barbas cannot be harmed during the course of gameplay, except by the Rueful Axe.
Um if sex can't cause a miscarriage neither can masturbation. I mean your not sticking a coat hanger or razor blades up there... I'm sorry about your miscarriage and get you're grasping at straws but you didn't do anything to cause it and if you're going to have one now there's not anything you can do to prevent it.
This should be safe and not cause pain or bleeding. At 14 your periods and cycles can still be irregular and changing. Our bodies are not machines that functions exactly the same every day, week and onto. While masturbation and orgasms are fun, you can masturbate too much.