Itching @ 35 weeks

I could not sleep last night two showers and It's everywhere like as soon as I stop scratching my leg my back goes off or my neck then my belly foot arm so forth anyone have had this happen to them this is my 6th baby and never had this symptom it feels like mites attacking me n driving me crazy even my hair tickles me. Where I'm continusly making sure all loose strands are in my ponytail