Prenatal Vitamins

Hi ladies! So I have been taking a prenatal vitamin for about a month or so (preparing me for when I get pregnant). I'm now almost 6 weeks pregnant and i just recently have been taking a prenatal and a multi-vitamin. I thought that would be better but I guess I could be overdosing and harming the baby. I have only been taking the prenatal and the multi-vitamin for another a week or two. Thoughts?