does anyone what could happen if I took 2 pre natal vitamins?

Nothing at all. Some vitamins are water soluble and you will pee out the extra. Others are fat soluble which takes a bit longer to get rid of but you would need to overdose a lot on the D, E, A, K vitamins to cause issues. Your body is pretty smart and will get rid of what it doesn't need.

for the prenatal pills I read on the bottle that you can overdose

Your body starts to get rid of what it doesn't need I think after four hours. The only one that I know of is too much iron to watch out for

I don't have the gummy ones

I don't have the gummy ones

I take two gummy ones everyday and I'm fine.

Ok ty

it could make you sick to your stomach

nothing.