Help please!!!!

I have had this awful rash for over a week now and was diagnosed with pregnancy rash or PUPPS. In a matter of days it spread from my tummy to my hips, hands, arms, backside and doesn't look like stopping anytime soon. And I'm going crazy with itch

Just wondering if anyone else has experienced this and what you did to treat it. I've already tried the following:

calamine lotion, anti itch creams, oatmeal baths, pinetarsol, low dose cortisone cream and my OB just started me on 5mg prednisolone. I find the only thing that gives temporary relief is putting on ice packs.

Hope someone can offer some other suggestions, I'm going nuts and feel so depressed I can't be induced yet as my cervix is not soft/dilated at all