Yeah i'd second the check with your MW or doctor. I read in my maternity notes that itchy skin can be a sign of liver problems - don't want to scare you.
I only read about it because I was having terrible itchiness on my feet, but this turned out to be simple to remedy, so hopefully yours is too.
I am constantly itching and was tested for the itching liver thing but it wasnt that and the registrar put it down to some women do itch more in pregnancy.
I was put on anti histamines that were safe in pregnancy and touch wood they are helping.
They also gave me some aquiaus (sp)cream as my arms went quite scaley and thats helped loads too
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