This is weird, but I found chewing gum stops the feeling of nausea. I'm pregnant with my third, and I've experienced all day nausea with all of them. Last week I was driving and the nausea became so intense I didn't think I'd be able to keep from vomiting. I ran out of water and decided to try gum. It stopped the nausea immediately. Now every time I starting feeling sick, I just pop in a piece and I'm all good.