PUPPP help!

So I had developed puppp at about 25 weeks with this pregnancy, it's my second boy, and I had to go into the ER because I literally worked myself into contracting at 28 weeks and the gave me a shot of rosephin and my rash actually got alot better and hasn't bothered me until I turned 36 weeks Sunday and I noticed the rash on my neck. By the next day it has over taken my body, it's on my boobs, belly, legs, arms, neck, and on the bottom of my face. It's figuratively eating me alive and I don't know why it came back and how I'm supposed to deal with it for the next 4 weeks or more until my little comes... Anyone have any advice or know why it came back? advice