Skin rashes

I am 36 weeks now but unfortunately having all reddish skin starting on the hand, face and latest on the baby bump. It is so itchy even i have no choice to face that unless to take a nap, but still keep on scratching my skin during my sleep. Did anyone feel the same? Is this normal at 36 weeks and above especially for first time pregnancy?? Help me please and give me some tips to overcome this