morning sickness

Alexis
I'm 8 weeks by my LMP but when I had my ultra sound she said it would be 6 weeks 1 day and at the time I would've been 7 weeks exactly. I have only had a small bit of nausea it's when I'm hungry. I had heavy cramps when I first found out and sore boobs that eases up at times. But no morning sickness? Is it normal and I just got lucky? One of the doctors I seen said it would hit at 6 weeks.