Hey, I totally get it and I have the same issue. It sounds like you're doing a lot of the right stuff!

Have you tried oatmeal soap or an oatmeal bath thing? Oatmeal soap helps me, plus I love baths. But with itching I would take a cool to warm bath, not hot. I saw this oatmeal bath thing on Amazon but I've never tried it: https://smile.amazon.com/dp/B000UEAARO

I take 4 zyrtec a day (2 morning, 2 night) and that helps me with my progesterone issues as well as all my other allergies.

I often rub ice cubes on my skin when it's that bad, too. Or there's instant ice solutions like gebauer's instant ice, a topical refrigerant. I have bought it on Amazon https://smile.amazon.com/dp/B000YA06NM/

It feels great.

Also aloe, maybe?