Hi and welcome Katie!
You are in the right place for help and advice! I've only just found this place myself and over the past week I feel more optimistic. I've had great feedback on anything I've wanted to know and found out about creams, lotions etc. that I have never heard of or been offered before but will be recommending from my GP.
Like you, I also have p on my scalp, 95% covered aswell so it's pretty darn hard to hide it, especially as I have really dark hair. I also have it on my shin, knees, elbows and in my nails. I used to have it on my neck aswell which is a rather strange place to get it but it has cleared up, thankfully.
What treatments are you using for you scalp? I've tried a few now but still no further forward.
I hope you find all the help and encouragement you need here. And don't give up on your dreams, don't let your P hold you back, you're stronger than that.
Nic x