Too sleepy to function!

Mmm
All last week I could not stay awake. I get up at 4:30am and get home by 2:30pm every day. Last week I was asleep  by 3:30pm after getting home and I'd sleep for at least 2.5 hours. After I'd make dinner and eat I'd be asleep again by 10pm. I am due to ovulate this week, would that cause me to be so sleepy? I'm just not normally that wiped out. I sure hope this week is better.