Need help PUPPP/PEP

OK so i am now 26weeks and 4days pregnant and I was told I had PUPPP/PEP a few weeks back but since then it's been getting worse I have used everything you can think of to relieve the itch and dryness listed bellow

Oatmeal baths

coconut oil bath

apple cider Bath

baking soda Bath

dermol Bath

cold showers

Epsom salt bath

dermol lotion

E45 cream

Aloe vera gel

hydrocortisone cream and antihistamines from doctor

Aqueous with menthol in

Coconut oil

baking soda

cold compresses

warm compresses

Ice packs

Calamine lotion

Aftersun cream

Grandpa's pine Tar Soap

child's Farm moisturising cream Palmer's stretch mark cream

And even milk

Nothing seams to work and my skin seams to be getting worse it's like really red dry scaly sunburnt skin that is really tight around my neck and feels like it will rip if I turn left or right so I went back the doctor today and have been put in steroid tablets has anyone else had/have or going though this what have you used and what has helped I'm going insane