I feel like this all the time. It's the worst. I'm so sorry.
The only time I noticed a difference was a couple months ago. I had made a commitment to go to the gym every single day for 21 days and during that period I started sleeping and feeling rested after only 7 or 8 hours (CRAZY FOR ME BECAUSE I USUALLY NEED 14 TO FEEL RESTED EVEN THOUGH I AM COMPLETELY...