Ah mamsh, alam ko yan! A few of us felt the same way, some multivitamins talaga ang lasa or strength nila sobrang strong, especially sa pregnancy when you're already sensitive sa lahat, kaya nausea agad. Try taking it with more food, like right after you eat, or break the tablet in half if pwede (pero check mo muna sa label), or even switch to a different brand na mas gentle, pero honestly, this is something you should mention sa OB mo next visit kasi baka may better option para sa iyo na ma-absorb pa rin properly without the nausea.