Suggestion - maybe if you set a timer and make yourself work on one project until the timer goes off, that might help. Then you can reset the timer and move on to something else.
I have a similiar problem right now... I need to go to the chiropractor for an adjustment (appt, for tomorrow) but until then, as much as I want to do things, I am too stiff to feel like doing anything. I feel like I am wasting time, but I also know I MUST wait until the adjustment or I will only make myself hurt more.