17 just found out I'm pregnant

Hey everyone I'm 17 just found out I'm pregnant a few days ago went to family planning  they think I'm around 3-4 weeks but they dident tell me much they gave me a book and I'm on folate acid and nero tab I think it's called but I'm a vegiterian and struggle with iron I'm booked in to go back Monday will I need more vitimins I want the best for my baby. So can you guys please comment some tips for a better and heathy pregancey and is there any other young mums out there? I'm from Auckland New Zealand