MTHFR Mutation

I found out I'm heterozygous for 2 gene mutations on different chromosomes. I've had 2 miscarriages and we were supposed to start trying this month. My fertility dr said to wait until the proper form of folate is in my system and the toxic folic acid is out - another 3 months. She didn't say much more about it, but research shows me much more. Has anyone made life/diet changes due to MTHFR? Has anyone had successful pregnancies with it? I'm terrified of having another miscarriage, as my last one was horrific 😢 Any advice at all is much appreciated.