started to vomit since week 7

Hello Ladies, I think I'm very sensitive to the medicine smell of B complex, Folic Acid & Iron. I always taking this pills after take my lunch and I feel acid reflux in stomach for some hours later that makes me to feel nausea then cause to throw up.. In between afternoon I also try eating fruits with water or some snacks with a cup of Milo. But it doesn't work, what should I do?