I had the same problem so I take kids Flinestone vitamins. My doctor approves them because they still contain folic acid.
My sister in law who has been pregnant the same time as me until about two weeks ago told me this and my mother in law said the same thing that the iron in the vitamins is what makes you sick. I'm 38 weeks and 4 days and as long as I eat something with them I don't get sick
I'm taking the equate brand for women's one a day with dha and iron. Try eating something before you take them. I always eat something with them and take them before I go to sleep so if it makes me sick I sleep through most of it
Any prenatal is effective. To be honest I just get the natures bounty at giant eagle. That had a local sale buy one get one free so I got enough to last the whole pregnancy and then some. Go by DHA, iron and just overall vitamin mg. Not much of a difference. Some have like 2p more mg of this vitamin or that.