Flinstones instead of Prenatals

So I’m really struggling with taking my iron supplements and prenatals because of my gag reflex and how they make me sick. I end up projectile vomiting every time and I have other medication that is necessary to take so when I vomit, my medication goes with it. It’s complicated. Anyway, I bought flinstones with iron and thought taking those are better than nothing at all. Thoughts? OB doesn’t want me taking prenatal gummies cause they don’t have enough iron or any I guess?? But so far flinstones are agreeing! I’m 19 weeks pregnant btw.