Hello, I would be happy to help you.
You skin specialist is not an OB/GYN nor do they have any idea what they are dealing with in a woman who is pregnant with your symptoms. Itching of the hands can be a sign of "cholestasis
of pregnancy" and carries with it serious risks to the fetus.
You must contact your OB/GYN and describe these symptoms and get the appropriate workup for this potential problem!
Please seek help!