sounds like it could just be an irritated skin issue. is the pain similar to a brush burn? I've overdone it before and nothing really helped except trying to have no contact on the irritated area for a while. for a day I hung around with my legs spread wide
I don't know if there is anything topical you can use. that skin is sooo sensitive I was worried about trying anything. so I opted for just air circulation and it felt better the next day.
did you use any lube?