Worry is a misuse of your imagination. Yes, it is!
CBT (Cognitive Behavioural Therapy) is a brilliant and exciting tool. You can use it to learn how to manage your worries. It is healthy to be constantly asking yourself "is this real or is this imagined?"
If you can't prove it and if there is no evidence for it, it's not real; you are going to have to let that thought/worry go. There is nothing in it and therefore please don't invest your energy into it.
The sooner you recognise that it's a waste of your headspace and let it go, the healthier you will be. It is just something you have made up in your mind - using your imagination in an unhealthy way. We all do it but the sooner you catch yourself doing it and change your thinking and behaviour around it the better!
If it is something real, then do what you can to manage it in the healthiest and most positive way. Make an action plan. That can be as simple as making a list of things that you can do now and in the near future to help make this thought "thing" go more smoothly. Once that action plan is in place you will already be feeling better and less anxious or stressed. Have a think about this now and see how it feels.
Take good care of yourself.