I'm on my third pregnancy now, and I can tell you that an empty stomach will make you more nauseous, which is why the saltine crackers are a good choice. Also try a straight peppermint tea. Make sure that it is mint only, and doesn't have other ingredients. Celestial Seasonings makes one. As much as people speak of the power of herbs, a lot of herbs used in herbal teas are not good for pregnancy, and a lot of teas add herbs you wouldn't expect.

I'm 33 weeks right now, and I am still having morning sickness off an on this time, but not intense. My toothpaste is a trigger...

Also try "sea bands" which are normally used for sea sickness. I've never tried them but some women say they are a huge help! And you just wear it on your wrist, so nothing internal. Hopefully it will all go away after the first trimester for you! My first two did.