Prenatal Vitamin Alternative?

Hi. I am currently 6-7 weeks pregnant, and am having SEVERE morning sickness/vomiting, that lasts from when I wake up till about 4 pm. I don't have insurance yet so I am not able to see the OB until June 2nd. I bought some prenatal vitamins from CVS and they make me SICK SICK SICK. So I have been drinking every day a carnation instant breakfast. Taking 2 Flintstones gummy vitamins, and tomorrow I am going to add a bowl of Total Cereal to the mix, Is this ok? I know prenatal vitamins are 100% important, but I CAN NOT keep them down. Is what I'm doing ok? Please help. Any input appreciated