Two different answers for Folic Acid dosage in my case.

hi all:

Last year I had a pregnancy with a congenital heart defect and had to go tru D&C.We've been trying to concieve (conceive) since then and I'm confused
as to how much Folic Acid I should take  in my case.

I've asked my OB  and she said 1000mcg would be fine.

I've asked my genetic counsouller who followed my entire pregnancy last year when the baby was diagnosed with congenital heart defect and they advised me to use 5mg.
They basically said that the fact that I did have a pregnancy with a congenital heart defect would make them want to ensure my folic acid levels were good, and this could be achieved with the suggestion of 5mg/day along with
a multivitamin.

I'm confused with two different answers and don't know what to do...