Anxiety is part of our biological system, as humans, but when it's misfiring, it's not doing you any favours. Learn some frameworks for dealing with being overanxious and stressing out.
Most sleep guides are pretty basic. Advice like drink less coffee, go to bed earlier, and don’t use your phone are all fine; but when your routine gets put under any stress, all of it flies out the window.
You've heard the fuss about this stuff. The scary thing is, it works, and is the secret weapon many happy and successful men use to quiet the mind and think clearly.