Have your prenatal vitamins made you sick to your stomach?

I'm not pregnant but started taking prenatals vitamins about a week ago to prepare my body. I've noticed the past 3 nights (I take my pill at 8pm, after dinner) I wake up around 10-11 with terrible stomach pains and nausea. Is this normal? I'm attributing it the pills bc I didn't take them one night in between and was absolutely fine. 

Vote below to see results!