Prenatal Pills

So I just started taking prenatal pills about a month ago and I had a really bad allergic reaction and I also kept forgetting to take the pills. Has anyone went throughout their entire pregnancy without taking prenatals? If so did it affect your baby negatively. & ladies please share what brand/kind of prenatals your taking? I don't see my doctor until next week & im currently 11 +5days pregnant! I'm excited to get my first ultrasound