my 4 year old daughter is hyperactive all of a sudden???!!!

[Bidders85]

Hiya all,
My daughter has all of a sudden become really hyper and weird, I thought it was because of the Xmas hols...but she's climbing on sofa, dog all the time evan when I tell her to stop, she doesn't listen, she takes 1 hour to get the coat/shoes on as she's gets giddy. Its not like her at all, if we tell her off she laughs at us! We recently told her that she will be having a brother or sister soon so I don't no of its that or not as its only been the last month or so. Can anyone please suggest anything or have had the same problem with there child????
Thanks

[Nevercan]

Is she eating anything different?

[Arion]

Mine was like this when we went to USA, it was the food colourings. There are more of these colourings available in the UK now, I got my DH a Santa with jelly beans from Next and that had the colours in the ingredients, so we know not to give them to her.