Itching but no rash

I'm 37+5 weeks I've been itching like crazy for the past week .. No rash or anything just itching ... My legs and arms especially !! And last night was brutal I couldn't stop itching .... I'm starting to have contractions also.. Should I make a trip to the hospital it just brush it off... I told my mid wife and she gave me Benadryl last week ... Didn't do anything