A fear or a concern of yours is taking over your thoughts and may be causing you to feel miserable - or it could be headed that way. A cyclical worry is winding through your brain, and you don't know how to stop it. You do have a tendency to ruminate on things that bother you, and because you're also tenacious, that pattern can become a saboteur of happiness. You can stop this. You can fill in that groove in your brain and form a better one. You're a good person. Your thoughts are just thoughts. Start thinking better - more positive thoughts, and forge a path in that direction.