Sleepy Head

I stayed up late to finish a practice exam for my stat class last night. I could go through it, but there are some questions I was not sure about. After I was done, I went to bed as early as possible but I couldn't sleep till late. Even during my sleeping, I had a weak sleep like I was awake all night long. When I woke up I found my roommate not in the room and found her in the living room awake. She pulled an all-nighter.