Chronic itching in pregnancy can be quite serious. I had it last pregnancy, and it used to keep me up all night - i casually mentioned it to my midwife and she freaked and sent me for a blood test straight away. Admittedly i had the itchiing in 3rd trimester. But i would defn talk to health professional about it .

My blood test came back okay (im not really 100% sure what they were checking for .....), they just put it down to stress.

Good Luck.