This morning,i got up at thress o'clock as it is too hot to

This morning,i got up at thress o'clock as it is too hot to fall asleep.And i studied until seven o' clock.But at the moment ,i was so sleepy that i fell asleep util fifteen to night,and now ,i feel that i am lacking energy and so tired,i don't whether it is because i hadn't breakfast or not!are you sleepy in this hot day?