I just want to sleep..

I don't know if it's because I have two kids  (3 year old and 3 month old.) and since I'm in my period it's making me even more tired to be running around with them or if it's just my period taking a huge toll on me but in exhausted.. Seriously I go to bed around 11/12 wake up at 9am and I'm still dead tired.. Right now it's 6pm and about to take the second nap of the day. I hate his feeling