Question about prenatal vitamins ?

ok, so ive tried taking the all natural ones from walmart, one a days, the ones the doc prescribed, and Flintstones. and they all make me extremely sick. my diet isnt as good as it should be either. since ive become pregnant, the taste of fruits make me gag. i had a professional nutritionist come over for a few hours, and she showed me how to make "yummy" shakes out of fruits and veggies...every combo ive tried makes me gag. ive also become EXTREMELY lactose intolerant during this pregnancy...i tried drinking milk last week..and it made me sooooo sick. im not supposed to eat red meats right now, or salty items because im having weird blood pressure patterns, and my doc does not want to put me on medication for it until necessary. the doctor said that i should be fine with this diet until im 20wks, then i need to try the prenatals again. well im 20 wks now...and no change. everything makes me sick. can this hurt my baby? im very worried about it. i feel him kick and move around, so i know hes ok...but im worried about his growth/health. anyone have this problem? please dont say "go to the doc" because i have, and she sorta brushes me off, or tells me to "refer to you baby books" or some crap.