Are prenatals really that important?

So i went to my doctors and the nurse said that my teeth could fall out if i didn’t take them 😳 because the baby will take all my nutrition from my body. But I’ve tried so many different ones and they make me throw up every time no matter when i take them and I’ve tried to take them with food and before bed but i still throw them up. I’m 33 weeks i i stopped taking them a while ago. Anyone else didn’t take them and everything turned out fine? My mother said she never took any and we all turned out okay. Every time i go to my appointments they say my baby is fine.