First of all, congratulations on your pregnancy.

There are quite a few pregnancy vitamins you can buy, like Blackmore Pregnancy & Breastfeeding formula, (available at supermarkets, chemists etcc...), alot of girls (including myself ) take Elevit, although these are only available at selected chemists. (I can only find them @ Terry White Chemists here).

As for what you should be eating etc... there is a article on nutrition on the main website, you can find it:Nutrition in Pregnancy

Also there is another topic on Listeria and what foods to avoid on the main site: Listeria

One other thing we did have a topic in ther forums re seafood, well prawns mainly, you can find that one HERE