Hey Nicky,
I have a patch of very persistant P on my arm where I cut myself a few months ago. I thought my selfharm caused the P somehow because there was literally 3 days between cutting and the first flare up.
Anyways, I used dovobet on the patch which scabbed over where I cut and after the skin had gone back to a normal thickness I used hydrocortisone to take away the redness. It's not totally better, but it doesn't look nearly as bad now. If it wasn't for the guttate all over the rest of my arms I'd be happy baring my arms

Take care of yourself. I know the P is such a horrible thing, and I get really tempted to cut again because I've felt so rubbish and depressed about how I look these days, the only thing that stops me is knowing that the P will probably 'attack' the cut an make stuff even worth.
It's such a crappy situation but you're not alone in it. be brave and don't be scared of harrassing the doctors until you're satisfied they're doing everything they can. People without P just don't understand and can be so dismissive of how much it can shatter your confidence.
xx