Open Question: when you get an email from your crush at an unusual hour?

When I email my crush, I always try to make it during the day because if I send an email for example in the middle of the night..well I don't know how to explain it very well but I get worried of her reaction if she sees the time of when I sent the email and maybe she’ll think I’m a freak for thinking of her all the time. So anyway, she seemed to be doing the same. But the last email I got, she sent it so early, around 4 in the morning and it was a working day also (her work place isn’t far and she could’ve done it later). So this kept me wondering a little bit. Is it a sign of her thinking of me all the time? Maybe that day she thought of when she woke up? Or is it a wishful thinking? xD;