You know what....when i was pregnant with my 2nd DD i had the exact sam problem!

When ever id eat anything dairy within about 30 mins id feel rotten and race to the loo....i became a seat warmer....LOL

Once she was born i returned to normal, but for the entire pregancy i couldnt use normal margarine, i had to use some other disgusting tasting marg...cant even think of the name...but it was grotty. I had to avoid ice cream, chocolate , cheese, yoghurt, milk, cream and any foods with dairy in it.

DD was BF for 3 weeks and was fine, then swapped to FF.....she has had no problems with any dairy so far....so i think it was just a pregnancy thing for me.

I never had this problem when pregnant with DS though....just DD2...