Or is it just a thought?
If there's a tiger in the room you're in, you're in danger.
If you think there's a tiger in the room when there isn't, there's no danger.
But sometimes our brain often reacts the same way to the imagination as it does to the reality. We sweat, panic and our heart rate increases all because of a thought. It's fight or flight in action. But you don't need to live like that.
Before you allow yourself to freak out, ask:
Is this a threat, or just a thought?
There's a very big difference.