Cholestasis

I've been pretty itchy on my back, arms, thighs, and ears for the past 3 days. It gets worse at night time. I honestly didnt notice it until my SO pointed it out that I was scratching a lot. I did some research and saw that I could possibly have Cholestasis ans since I am 36 weeks today I decided to call my nurse line once they opened. But she told me that if it's not my hands and feet that I should take Benedryl. So we went out and got some, i took some but dont feel like it helped any, I'm still kind of itchy. Has anyone taken Benedryl for the itchiness and been okay? I havent changed detergents, lotions, or body wash, so I'm not sure what it could be.