Congrats and good luck!
Folic acid is another form of iron, which you will need, mutli-vit's like preg-a-day or Lactalins are good to take but do not contain enough of everything as a pregnancy progresses.
I always thought that folic acid should be stopped around the 12th week but I presumed wrongly. My Gyn has told me to keep taking it, if I am wanting to breast feed then when I hit my 7th month, to re-concult her and she'll advise accordingly.
It is essential that you ask your gyn to prescribe you iorn and culcuim tablets, esp whent he babies bones start to grow, it will help out with your teeth also. You may find that as time goes on, your teeth will be prone to infections, sensitivity, bleeding gums a lot more, this is why you need your calcuim.
Zink is good to take also, keeps your brain from forgetting things
Vitaman C,B and E's are essential too. I was taking Lactalins but in the last 3 weeks and felt a better difference in taking all different vitamins rather than one tablet combined.