You're a smart lady so some of these suggestions might be redundant. If you feel way behind, the tasks seem monumental which makes it feel impossible. Can you make a list with the priorities at the top. Set reasonable goals -like 1 or 2 a day.

What works for me, is I deny myself a pleasurable activity like being on PC or reading/TV until the task is finished. Are you normally able to do your tasks. Some adults have undiagnosed ADD. How about do some tasks after breakfast tomorrow. Sending you good energizing vibes to get moving.