You’re not really multi-tasking, are you? Admit it. You’re half-assing two things. Or worse yet, you’re quarter-assing four things.
Unless the top two items on your agenda are Walk and Chew Gum, you’re never really doing two things well if you do them simultaneously.
Try doing one thing at a time, to the absolute best of your ability, and see if that feels better than being constantly busy getting nothing done.