cholestasis 30 weeks pregnant

I just had a doctors appointment today, and I complain to my OB about how I haven’t been able to sleep these past couple days due to being extremely itchy at night. Initially, I went to complain about the lack of sleep, but by the end of that appointment I had to take a test to rule out cholestasis.  This is my second pregnancy and the first time I’m hearing about this. My symptoms are pretty mild. I’m hoping for the best, but is there any other moms out there who have experience this and can provide any tips? Also, she scheduled me for an ultrasound next week not sure why when I have my 33 week ultrasound the following week. I’m stress itching as we speak lol