i used to sleep 16 hours..yes yes i did..i was young i partied hard for 5 to 6 hours than back to bed but i was puttin my body through the wringer so it needed repair.....are youy taking any medications.???
but listen to this some people not all but some people including me for some time go to bed around 9pm and wake up around 7 or 8 in the morning....that's 10 hours right there! and some people will sleep longer....see it doesn't seem like it's that long when you sleep during the night when most other people sleep but when you sleep during the day it feels like it is not normal, when i worked night i would go to bed aroun 5:30a.m and wake up just before work aat 4:30pm....yer normal your sleep is normal no worries unless you wakew up and feel more tired after ten hours than something isup