Cant keep prenatal vitamins down??? help!!!?

my doctor told me to take a womens multi vitamin while we were trying to concieve and she said switch to a prenatal when i got a positve test well i got my positive test about 2 weeks ago and i was still taking the multi vitamin withthe folic acid like she said then i got the one a day womens prenatal that ahs the dha/ ara pill with it that is really good for the babys development and growth. and i took it two days in a row when i ate ( just before i ate) and after i ate and had one or two bites left i had to puke i didnt take it today and i did not puke. please help i need to be able to take vitamins!!!! i called doctors nurse she said stop taking the vitamins until my visit in two weeks on nov 4th. but early pregnancy is a major development time for baby and i ahve been doing everything to be good to this baby. any thing i can do to help keep them down. when i puke i am sure the vitamins just come right up too since it is 5-10 minutes after i take them