C.D.
I'm not sure what you can do for relief in the short-term, but I would suggest you go see your OB very soon.
I had something called gestational colestasis - occurs in around 1% of pregnancies, so not all that rare - where your bile duct stops draining and bile salts start to accumulate in your system.
The main symptom is itching, especially at night. It's nothing to be alarmed about, but it does need to be managed. Of course, you may have something else entirely, but it's a good idea to find out.