I don't know about the estrogen link.
I'm confused as to why you're not allowed to say what new thing you're trying. Everyone is always talking about different products, diets, meds, etc. that they're trying.
My bum burns sometimes and I am on the pill. I think I have a dry bum. Maybe I have a tear or cut?
Hope you find some relief. I use a&d. It helps a little.