Extrapolating your current trajectory, if it’s not where you want to be heading will give you anxiety. Your brain is working from the data you have. If you’re in a job you don’t like, or have clients that aren’t who you want, it’s easy to think that’s the way things will always be. Of course, it’s delusion. If anyone could predict the future with absolute certainty they would be rich, secure, confident, and likely the luckiest person on the planet.
Extrapolation always needs to be weighed against facts uncovered through experimentation to confirm. Thinking that because a steel bracket in your garage deflects only a 1/4″ under 200lbs, and that 1/2″ deflection won’t see stuff sliding off it, so it can handle 400lbs is folly. Steel isn’t infinitely elastic, and that’s what extrapolation comes down to, assumptions. Put that 400lbs on that bracket and you may find out just how wrong you were.
When you have anxiety from thinking about your future, quit making so many assumptions, and simply take action to either make your positive assumptions come true, or your negative assumptions become false. That’s all there is to it.