Prenatals

So I’m 6 weeks and 5days pregnant I’ve been on prenatals for just about two weeks now and i don’t know what to do every time I take them I feel I have to throw up or I end up throwing up I use to take them with food, tried taking them than eating 5-10 mins after I tried taking them after I ate and I still don’t feel good when I take them I’m not sure what to do it’s my first pregnancy should I talk to my doctor about this? Or is it normal to feel nauseous when having them.