Prenatal vitamins???

I'm currently 28 weeks. Around 13 weeks I got my first bottle of prenatal vitamins (I found out later), and went through the whole bottle. Later on, I got another bottle that made me wanna throw up and made me feel horrible so I stopped taking them. If I start taking the new bottle I just bought, will that be okay? People keep telling me not to worry about it but I still do. Everything's been normal so far at all my appointments but i feel bad for such a big gap without them.