Im 6w1d and i started my prenatal vitamins a couple of days ago.... i started having bad headaches after, the first day it was mild the second day it hurt so bad i couldn't get out of bed, today i didn't take one and my headache is gone, anyone else have an issue with their prenatal vitamins? I have been pregnant before i have 2 children i took prenatals the whole pregnancy with my first child shes 11 years old and didn't take any with the second shes 6 years old so i honestly don't remember this happening before. Yes im aware headaches are common during pregnancy but i just thought it was odd it started when i started taking the vitamins and stopped when i didn't take one.