I know exactly what you mean... I sleep my body sore..
I am currently going through one of these sleeping phases after I hurt my hamstring. It was in the second week of my daily 15 min exercise that I finally, finally felt up to for the first time in almost a year.....
I am basically averaging 14 hours a day, pretty much just wallowing in this setback, but my all time record that I know of was close after my breakdown at 17 hours..... every day for about a week... Needless to say, I can't remember much of that time :P