Oh that need to be busy! I used to get more done in a day than I do now in a week! It took me several years to adjust. The need to be busy is a trauma response which our society steps up as an accolade. A great way to mask trauma as we are praised for our productivity.
By the way, I note your comment about not having kids. I recently started a new publication dedicated to the childfree and childless, it’s called Life Without Children, take a look and if you’re interested I’d happily add you as a writer 😀