What to do with that feeling that there aren't enough hours in the day?
Throw it over your shoulder. Aim for the trash can.
There are twenty-four hours in the day, give or take. Always. There's no use spending any of them worrying about needing more. Like the genie in the lamp who says you can't wish for more wishes, you can't time for more time.
Use the time well, or not. Get more done, or less. But if you missed the trash can on the first shot, pick up that time anxiety off the floor and dunk it the second time.