Congratulations! I know exactly what you mean. I am on day 14 and can't believe how different it is to wake up feeling rested and NOT shameful! I was just telling my friend about my weekend and how much I got done - with little effort - I spent the day outside, between chores, reading a book I have been trying to read for about a year and played with the kids, went swimming and took them for a walk. I was lucky to get a load of laundry done and sweep the floor before.
I had really bad fatigue and sweats up till about day 10 - now that they are gone, I can't get over how good I feel - physically and mentally.
Keep up the great work and enjoy your sobriety.