Just as each person and each quit are unique, so are the withdrawal symptoms experienced. A common one of them is depression - and that could be the reason for your sleepiness. Your body is also working extra hard in the background to try to clear itself out and heal from the damage done to it by smoking.
Whatever the cause, enjoy the extra rest! Some folks have terrible insomnia - and I think you will agree extra sleep is easier with which to deal! This, too, shall pass as you get further along in your quit.
You are almost through H#ll Week! Congratulations! Keep going!
Nancy
