Worrying about something that may not happen is a waste of energy.The term implies that it may not even happen, therefore worrying about something that may not happen does a number of things...
1. You worry about something, then it doesn't happen. You've worried for nothing. Made yourself feel bad.
2. You worry about something, then it does happen. You have to deal with it, but have effectively dealt with it twice. Worrying instead of being in the present first, then dealing with it as you experience it.
In each case you have used energy you didn't need to use. Reinforced negative habits and patterns making it more likely you will do it again, and it becomes easier to worry about minor, even meaningless things in a similar way.
It all comes out of fear. Fear of failure. Fear of a future you can imagine but don't prefer. Focussing on what you don't want actually makes it more likely you will experience it. Law of attraction is impartial. What you put out is what you get back.
Worrying about things that are deteriorating and you don't have the resources or knowledge to solve them, and no one else does is a worry.
I agree with the law of attraction and I know what I want out of a situation that is worrying me, however events have occurred that may not make it possible. I can't go into it on here, I am sorry about that, however as events have happened, the consequences are dire, and I mean dire, talking about basic human needs not being met.