I am having exactly the same thing happeneing to me at the moment. Its horrible!! I spoke to the dr and the pharmacist about it, its pretty normal. I have continued taking the Elevit - but i now take it with a glass of orange juice (apparently this helps) and either one or 2 metamucil fiber capsules. Which the pharmacist said are very safe to use during pregnancy. And i have also increased the amount of fluids i am drinking. I have found this has helped me no end! hope that you feel better soon. x