Extreme all-over itch

Bry
I've already tried to see if others have asked this, and Google doesn't help. Has anyone else had a really extreme itch all over? Seriously, anywhere there is skin. This is driving me nuts. It hasn't stopped since yesterday. Lotion or a bath doesn't help. My husband even had me try Benadryl. I need some help! D': I'm 27 weeks if that matters.