I suffered from a bad rash when I was about 15 weeks, was scratching like mad around my thighs and upper arms, and it was keeping me awake. I went to the GP and was given some chlorphenamine antihistamines (aka Piriton) and some aqueous cream. The rash was a result of using some body lotion, even though I have tried this lotion before without any sensitivity, it seems pregnancy increased my allergic reactions.