I was in the same situation in the beginning of mine. Nausea was the only symptoms I ever had throughout my entire pregnancy. I switched taking my Prenatals from morning to night and haven't felt sick since! I recommended to everyone that tells me their nauseated to try this cause it helped me! Granted, everyone is different but take it into consideration.  I was constantly nauseated whether I ate with mine or not. But taking them at night I was perfectly fine! Good luck to anyone else!!