vitamin d supplement- too much?

Hi all- at our 2 week appt, the pediatrician recommended we give our LO vitamin d. I swear she said at drop at the nipple at each feeding. I should've read better, but now at 6 weeks, I noticed thr bottle says 1 drop daily. I haven't been diligent at giving it to her at every feeding, or evn every day, but there have gmfor sure been days where I've given it to her more than the recommended amount.