Super sensitive skin 😖

Kristen • First time mommy to be. Expecting our baby boy January 2016 ❤️
So before I was pregnant I had sensitive skin (no perfumes in lotions or body wash) now that I'm pregnant it's only gotten worse I have this rash on both legs and my belly. Does anyone know of a good hypo allergenic body butter I can use on my stomach to help prevent stretch marks? Thanks ladies!