Hi, I'm not sure what I can say to help but if you're thinking about all that, you're probably not evil. Cause I don't think an evil person would question whether or not they're evil. They would probably be like: "Oh, I'm evil. Cool." But you're not like that. Therefore, you're not evil!

If you're not comfortable with talking to a stranger, why not a trusted friend or relative, preferably one that knows about your diagnosis. Also, you feel guilty about kicking your dog and even tried to make it up to him. That's not very evil, is it? Anyway, maybe if you prefer trying to solve this without telling anyone in you life, maybe beat the thoughts with logic. If you're comfortable, watch movies/shows about evil people and note how you differ from them. Hope this helps

<3<3