(((Blessed))) Sounds a bit like grief mixed with depression. Both can make you feel as though you have no energy for anything....
What a can tell you is.....you will feel better! I felt washed up and used up after my divorce just from the emotional roller coaster, but it did pass.
It sounds simplistic, I know, but try to do some little things for yourself--make your favorite easy meal, go for a walk, allow yourself an extra 30 minutes sleep.....
Hugs! HG