OMG! Yes! I didn't think that could possibly be an actually symptom! It feels like I have hundreds of skeeter bites all over my shoulder blades but my husband says there is nothing there! Crazy!
I'm only 10 weeks but I have been itching like crazy for almost a month. I dont know if yours is the same, but mine is accompanied by visible patches of dry skin. I did a little googling and it seems to be a fairly common thing. I've been using lavender oil at night, which seems to calm it down enough to help me sleep.
Re: Does your back itch?