mogwai, I am sure you already know about this, but itching can also suggest a condition called obstetric cholestasis (sp?) might be developing. Have you mentioned the itching to your midwife, just to be on the safe side.
I think piriton tablets are safe in pregnancy, but do also check that.
hi mogwai, I had this too and calendula cream really helped - you can get it from Boots or Culpeper. Boots sell the nelsons one. It's marigold extract so safe in pregnancy. Hope you have your little one soon.