HELP!! Is this a sign of pre E or pupps

Ivey • Pregnant with our Rainbow baby 👶🏼 🌈 12•09•2018

So i have a rash all over my body dr thought it was pupps i went to the dr was diagnosed with acute appendicitis. Still in pain still itchy my blood pressure hasn’t been high at all so idk to do this is a picture of my arm of what it started out as! Just want help also am being tested. For PRE E