I would call the doctor and let them know you are suffering from headaches and tell them you went off of your prenatal vitamins. I know they are going to want to call in another vitamin for you to take so I wouldn't wait long before letting them know. I did suffer from headaches more during pregnancy and still at 35 week have them regularly.
i just copied and pasted my post here with u ladies as i have got no replys to my other post.. and update to this post too. i have not taken my prenatal vit, since thursday and have been headache free.. hoping i have found the sorce, but now ill have to find out why this is happening,, and if my vit is the culprit, what do i do??? just hoping someone knows or has gone thro the same thing... thanks girls