Well I believe I'm nearly 2 weeks pregnant now but I'm moving out of state so I don't have time to go to the doctor nor the money right now. So I was going to wait till I get over their which maybe 2 more weeks . How long can i wait till I have to start taking prenatal vitamins? I was going to by some at like Walmart but o had a conversation with a pregnant girl she said I don't have to take any till atleast3 months is this true?