Help! I was taking multi vitamin & prenatals

Please ease my mind! I’m just 4 weeks pregnant this week and I’ve been consistently taking both multivitamins and prentatals since before I knew I was pregnant. I stopped the other day because I just happened to come across something that said too many vitamins can cause birth defects.

Is there any chance my baby is okay since it’s so soon? Or is the damage already done? I had NO idea and idk why this isn’t something that doctors or anyone else tells you about.