Superfood, Other Herbs Safe During Pregnancy?

I just found out I am 6 weeks pregnant. I have been taking Dr. Schulze 's Superfood for several years. Now that I am expecting, my doctor wants me to take prenatal vitamins. Is this necessary??..... as I feel I am getting more nutrition and folic acid by taking the Superfood. I am over 35 so I want to be sure I am getting enough folic acid.

Also, I take Schulze's IF#1 and/or Oxypowder for constipation. Has anyone taken these safely during pregnancy? I just wonder if the ensuing constipation would be more harmful than taking those products. I also take daily lactobacillus to keep my immune system boosted.

I would appreciate your input/advice.

Thank you.