Oh, absolutely! Stress can be a terrible enemy of sleep. And it runs both ways: stress and anxiety make it hard to fall asleep and stay asleep, and the resulting poor sleep quality makes you less able to deal with things that cause stress and anxiety. I have a whole chapter on this in my book. And on Medium, I've written a lot about how to combat stress. Here's one article you might find helpful: https://robertroybritt.medium.com/how-a-stress-expert-deals-with-her-own-stress-48d78b1f562