No condom, chaffing?

My mans and I have been having raw sex for a while but recently, the past few times we’ve had sex, I’ve started getting a raw sensation on my labia. It’s kinda like chaffing only it’s focused on the bottom of my labia, closer to the anus. It’s to the point where we have to stop and do oral because it hurts less. Anything to help prevent this when we have sex? I can’t use most lubricants because they break out my skin really bad, and I don’t understand why this is happening when I’m SUPER wet??? Sorry if this is all over the place!