Sometimes I don't feel pregnant, even now and I am 32 weeks! I didn't start getting to the point of feeling pregnant until I was around 15-20 weeks, and the only reason I felt it then was because I had morning sickness. Consider yourself one of the lucky ones if you feel great during pregnancy! I didn't start feeling bad until about 25% of the way through my last trimester, now it's hell to pay! Enjoy the nice moments while they last!
Don't worry! All women and pregnancies are different. I didn't have any nausea really until about 9 or 10 weeks, and I still never threw up. I'm 23 weeks now and baby is perfectly fine :) just hope you don't have those symptoms! Lol.