Prenatal Vitamins?

Have any of you ladies have had any luck with a certain brand of prenatal vitamins? I've been taking the gummies (Vitafusion & First Response  brands) and they make me sick to my stomach. I have tried taking them right before bed instead of the morning, taking them with crackers, etc. but nothing helps! Plus, my doc said the gummies were okay to take in my first trimester, but Saturday starts my second and I need to start taking vitamins with iron in them! Thanks in advance for your help!! :)