I feel for you. I haven't had one of those all nighters in a while, but at times some of my meds really screw with my sleep. Even if I actually sleep, it's very restless with stupid dreams and I don't really get any rest! Hang in there!
That's the trick -- I can't tell you when the last time I woke up feeling rested. I will wake up in the exact same spot I was in when I fell asleep and swear I'd only just dozed off for a second. But the clock says I've been out for 3 to 4 hours usually. And there is no going back to sleep ... It sucks. MAJORLY