Why am I itchy every day?

Hi, I'm 11 weeks pregnant with my second baby and for the past 3 or 4 days my legs have been really itchy. Its the whole of my legs and I've been putting E45 itch relief cream on but its not working. My arms and back are a little itchy too but not as bad as my legs. I'm just wondering what might be causing the itchyness? I've had a lot of stress recently due to family bereavements, etc so I'm not sure if that might be the cause of it.