Morning sickness?

Hi ladies,
  I'm 5 weeks and had a weird morning.  I got up to pee, and while sitting on toilet became intensely nauseated (to the point that I became instantly soaked in sweat) and has to lay on the floor til it passed and I could go back to bed... Is this 'morning' sickness?  Cause holy crap! If not, any thoughts?  Thanks ladies!