Possible high bile acid?

currently 35 weeks with my second son randomly started getting super itchy on my feet hands and it slowly spreaded all over my body my feet feel like I took a C4 energy drink and then decided to lay down sometimes at night told my doctor about it this last appointment she started making arrangements in urgency kinda freaked me out got my blood drawn but my labs came back for my liver completely normal but apparently I can still have high levels of bile acid so we are waiting on those to come back 🙃 I feel like if they come back negative or normal im just gonna feel stupid for having to go through these nst twice a week and wasting time but at the same time I rather be safe than sorry? but if everything is normal WHATS CAUSING MY ITCHYNESS