Pregnancy Rash

Hi I am about 10 weeks pregnant and have broke out in a severe rash it started on my hands and has now spread all over my body. The itching keeps me up all night and no creams or gels seem to calm it down. I haven't had a scan yet so I am a little worried and wondered if anyone else has the same sort of thing? I have been to doctors but they only seem to give me a cream and send me on my way.