Could I still be sick because I'm not taking prenatals?

So I was taking prenatals in the first 3 weeks I found out i was pregnant but then stopped because I thought they were making me sick. I still have them just stopped using them. I'm now 14 weeks and haven't been taking them. I was planning to start taking them again once I felt better but I'm still throwing up almost every morning and sometimes after I eat something that the baby doesn't want lol. Should I start taking them now even though I'm not feeling better? Could taking them possibly make me start to feel better? I'm a FTM so I don't have any pregnancies to relate this one too.