Pregnancy safe??

I am 24 and a half weeks pregnant and I've been broke out in an all over body rash for 2 months and it's been decided it's eczema or psoriasis, my dr has wrote me a cream but the itching is still driving me crazy and I can't hardly sleep! My mom found someone selling homemade organic creams and got this, but some of these things on google say it's not safe for pregnancy. Any idea??