Prenatals

I'm looking for a good prenatal. I was taking Walgreens brand but they made me sick. I switched to using Vitafol samples my doc gave me and those are great!...but they are wicked expensive and available with a prescription. 😞 Just wondering if anyone has had any success with anything that isn't too expensive, is OTC, and one a day. (I can hardly remember one, nvm 3!)