I was 2 weeks late on my period, but have eregular periods so I didn't think anything of it. So after 3 weeks, I took a pregnancy test and it came up positive. I have been taking vicodine for my back, I have a pinched nerve. But I was woundering what cerious problems could happen to my baby because of the vicodine? I have stopped taking them since I found out but I am really worried.