Sad,shock, confused, scared.

I had a chemical on December 21,2019 . I just found out I’m pregnant again after being 9-10 days late. I’m scared it’s going to end up like a chemical again so I was wondering what type of vitamins are good to avoid another chemical or FOODS to eat ? I can’t go to the doctor rn because they’ll just tell to wait 3 weeks or so to make an appointment and I lost my other one being 6-8 weeks long .