Wouldn't hurt to take another right?

I couldn't take prenatals for months because every kind we tried I kept throwing them up every single day, I finally found one that works for me. I have to take two a day but i can't remember if I took two or not. I'm sure that I took atleast one. One more wouldn't hurt right? I don't want to just not take one because I haven't been taking them for so long, so I want the full dose every day.