Well I took a test when I was 2 days late & it was negative. I'm 20 weeks pregnant now. However, morning sickness in most people doesn't start until around 8 weeks, therfore if it was last Thursday & Saturday I doubt very much it's morning sickness. I also never got any cramps, I just got really REALLY sore boobs & my sense of smell was so SO strong. It doesn't sound like you are but you never know until you take the test!
Good luck & hope you get the answer you want.