Want to Sleep

I have had no sleeping for 36 hours in three days in last week because I needed to prepair my
mid-term exam.There were three subjects waiting for me.Calculus , Logic Design and English.
Because of these three subjects , I had no sleeping all night continuous three days.
After finished all tests,I really wanted to sleep at night.I fount that I could not fall asleep easily.
Oh! I thought that I had already been used to sleep in the morning.I plan to sleep early in this week.If I wouldn'd do that , I would die.