I agree with the others. You don't take a children's vitamin for a pregnancy. You need something different. Your doctor will talk to you about prenatal vitamins, not just a regular adult vitamin (many of which have warning labels, by the way). If that conversation hasn't happened yet (which is odd), call on Monday and talk to the doctor or nurse.
When you have a child, you don't give them commercial vitamins like this (from supermarket or "health food store") unless directed by a doctor. If you read the label, you'll see they have warnings on them even! Many pediatricians don't think they have enough nutrition in them anyway, and because they are incomplete (despite the name "Complete"), most of the nutrients aren't absorbed and are eliminated. In fact, many doctors call them "expensive urine" because so much is eliminated when they pee.