About 1/4 of women get lucky and just don't get sick. I've had other symptoms, but I've lucked out on the nausea. I haven't been sick at all, and I've only had one two spells of bad nausea, one of which was pretty obviously from standing in the sun for too long waiting for the bus, rather than just hormonal (no idea what triggered the other one). Then maybe three or four times I've had some very mild queasiness, and that's it. It made me a bit nervous at first, but I've made it to nearly 14 weeks and seen baby twice, and everything looks great, so now I'm just glad I didn't have to suffer.