Vitafol Ultra + 800 mcg Folic Acid?

Melissa
Hellooooo ladies. 
I'm 4 weeks along and my dr gave me some samples of Vitafol Ultra to try out. I've been taking Natures way prenatals with DHA which have 800 mcg folic acid.. now the vitafol has 400 and he wants me to take an 800 mcg folic acid vitamin with it... is that too much? And am I okay with just taking the ones I was before?