So I started taking woman's one-a-day prenatal vitamins yesterday morning, Had no problems at all. This morning when I woke up I noticed some blood (not a lot but a little bit) when I went to the restroom.. took my vitamin... when I got to work I went to the restroom again and I noticed spotting.. I am suppose to start my period on Sunday.. Is this normal for people who just started taking prenatal vitamins for the first time? Is this normal? Has this happened to anyone else? **A little worried since I don't start my period till Sunday**