Advise about treatment and GP

I was officially diagnosed with scalp psoriasis in Febuary 2026. Since then I have been prescribed several steroids and lotions, which initially help, but I always end up with a build up of scales and severe itching. I have tried Betnovate, Enstilar Foam, Dovobet, Mometasone (or Elcon -which is always out of stock), and Sebco. I have now been prescribed Diprosalic scalp lotion - is this a good option? I am concerned that I have been using steroids continuously, twice a week since diagnosis, my hair seems to be thinning and I loose a lot of hair when washing it - is this normal or something I need to address? Is it the steroids causing this or just psoriasis in general? I have asked my GP these questions and get no direct answers, just to continue using steroids twice a week, and they just keep prescribing lotions without any response to my concerns. I appreciate anyone who takes the time to answer with advice and personal experiences, I realise this is not a replacement for professional medical advice. Thank you