You conceived 7 weeks ago if your pregnancy is dated at 9 weeks. You look bigger because of all the gas. It is the first trimester bloat.

kiwihefer, if you usually menstruate at the beginning of each month I would say your ultrasound is measuring correctly. It depends on each individual as to when they show. Mabel is correct in stating you could be bloating. Your body will be going through many changes. Relax, dont stress yourself out. And rule of thumb just because a book may say you will experience morning sickness and vomiting at 8 weeks does not hold true to everyone.