I am around 20ish days...and I go in waves. The last week or so, I've been REALLY tired...sleeping 8-10 hours/night! I feel so much better when I wake up though compared to when I was drinking...I just thought I would have MORE energy, not less. Who knows, I assume its just part of it. And in the meantime, now that I'm a little more used to it, I've actually been enjoying all the sleep.