...possible causes? I was very anxious all night and could not fall asleep. I didn't even doze off for a minute which is normally what happens if I have to stay up very late. I didn't have one particular thing i was anxious/nervous about, but just in general i was really anxious. I haven't had any more or less caffeine today than usual and my schedule was normal, so i am wondering what could have caused this. Also, how is my body going to feel today. I have to go to school fairly soon as well.