Prenatals

So I take the Rainbow Light prenatals, i got a box that came with a bottle of Fish oil/DHA vitamins. I finished the bottle of the DHA vitamins but haven’t restocked. Personally, it makes me gaggy taking the DHA.

So my question is, is it necessary to take a DHA? I’m 30 weeks and have been taking my regular prenatal but not a DHA for a while.