Cocoa butter- rash?

Andrea • Baby boy born 2015, excepting babe #2 in April 2019!
I've been using palmers cocoa butter on my belly/boobs for the past few days and now I have a itchy little rash. I'm thinking it's the cocoa butter because before I was using burts bees belly rub and no issue. Anyone else have this problem? It's not super bumpy or anything, just feels irritated.