Allergies in pregnancy?

Is it possible to develop an allergy or intolerance to something during pregnancy, that has not affected you before?

I have been ill a couple of times recently, with some symptoms very 'bug' like, yet no-one else around me has been ill. The first time I wondered if it was something dodgy I'd eaten, now having been ill again just 5 weeks later at the weekend (but only me) I'm thinking it could be a reaction to something. Although it's like a bug, it's somehow different-although I can't really explain it. But this last time I was in serious pain and frightened; and I'm not one to fuss about this stuff. I can't think of any other reason for it, so could my body be re-acting/ rejecting something? It's not just a dodgy 'pregnancy' sickness, it's really nasty and draining, actually ILL!!

Was at doctors today and she said that yes you can have reactions to things during pregnancy that wouldn't normally affect you, so obviously my little bubs doesn't like something I've been eating. Better not be chocolate, how would I cope without?!?!?

Slightly off-topic but did you know that seven per-cent of babies in the UK have a dairy allergy? That seems quite high to me? Here's an excerpt from the article that I read a few days ago:

"It is the will of Mother Nature that babies are designed to drink milk, building a picture in our minds that milk is both natural and nutritious, so it can often come as a surprise when very young children develop a dairy allergy, but this is the stark reality for seven per-cent of the UK’s baby population.

Diarrhoea, flatulence, bloating, constipation and flatulence are symptoms all associated with dairy allergy in babies and infants, something that no parent is keen to see their child going through, and something that can cause anxiety for both parties, but this can easily be treated or managed.

If children avoid cows’ milk for the first nine months of their life, the risk of developing a dairy allergy is thought to be significantly reduced. Many medical experts claim that the reason these allergies are on the increase is purely down to the fact that mothers choose to breast feed for much shorter periods than previous generations did, and often opt to use cow’s milk as an alternative."