Win 7, Dell Latitude E5530 - laptop turned on automatically at night at hotel - should I be concerned with a security issue?

Hi, after being connected to a hotel's wifi system, I shut down my laptop to go to sleep.  The laptop definitely shut down.  I woke up around 4 am to the light of my laptop screen being on.  

Should I be concerned?

Are there any logs on my laptop that I should review?

I've already updated Windows update and run my Norton Internet Security scan.  Could someone have stolen data from my files by booting my laptop somehow and hacking it???