As part of a class project I've been researching treatments for "morning" sickness in pregnancy, including the natural remedies and all that jazz. My personal recommendation is Sea Bands or a similar product that's squishing that spot on your wrist, by the way, and if that doesn't work, go ask your doctor's office. The American College of Obstetricians and Gynecologists (that's the lady-parts doctors) recommend taking vitamin B6 at a 25 mg dose, three times a day for treating nausea and vomiting in pregnancy, and adding an antihistamine to that if needed as the first-line treatment.
Then I was browsing places in the diet where you might be getting a lot of vitamin B6, because there's some evidence that having a higher level of B6 decreases nausea and vomiting, so maybe people who never get morning sickness are just eating lots of whatever food it is.
And highest on the list? Chickpeas or garbanzo beans (why we can't just have one name, I have no idea, silly English). What did I eat almost exclusively in weeks 9-15 of pregnancy? Hummus aka chickpea paste on crackers.
Maybe there is something to all that "your body knows what you need" deal.