T.Y.
Hi D. - first of all - congrats on your pregnancy!
I had cholestasis during my second pregnancy and I feel your pain or should I say itch '-) I used oatmeal baths and natural soothers like aloe or mint lotion. It had a cooling effect which helped. I also took Benadryl in the evening (children's) which helped the itch and helped me sleep. Of course, check with your obgyn before taking anything.
I did have a healthy baby and You're having precautionary non-stress tests to monitor any red flags that arrise so - try not to worry.
Good news is - the itch went away about 1 week after my son's birth so - it's something to look forward to - in addition to the birth of your child.
Good luck!