For example, I sometimes worry about my computer breaking. This is something that I cannot control. All I can do is try to protect it. But no matter how I do I always feel anxiety.

I know this is a low probability event. And even it may happen, being anxious right now has no use to prevent it from happening. But I just cannot control myself.

I try to stop drinking coffee and it does help a lot, but I still have this anxiety. Sometimes the thoughts just pop up in my head and my thought just sinks into it instead of doing the work that is actually important and should be anxious about.