Trying for baby as a vegan

I am a long time vegan and just started trying to concieve. I eat very clean (veggies, fruits, soy, legumes, and whole grains). I take a multi vitamin, along with an extra dose of magnesium, calcium and b12. Does anyone have any advice on foods, portions (I also come from an eating disordered past) vitamins, or anything I can do to ensure a healthy vegan pregnancy (should I get pregnant)? I know a few people who were vegans, but completely changed their lifestyle to incorporate animal products during their pregnancy. In addition, some family has warned me to stay away from soy.