What to do next

Hi, I am 22 years old and was diagnosed with psoriasis about a year and half ago. Upon diagnosis the doctors was unsure if I had Guttate Psoriasis or Pityriasis Lichenoides. I started with my first flare up in winter 2020 after COVID though it then cleared up on its own throughout spring. However, since autumn 2021 to the present day my psoriasis has progressively returned and the flare ups are much worse than the first time round. It has now spread all over my body and in my scalp. I have been put on multiple steroid oitments including Dovonex, Enstillar and Dalonev. The steroids seem to work on some parts of my body (mainly my back) but only for short peroids of time and if I stop using them for a couple of days my psoriasis will flare back up aggresively. I am unsure what to do next, as the flare ups are still getting worse and because I am so young I do not want to keep relying on these strong steroid creams as they thin your skin and don't seem to be that effective for me. The doctor intially said this flare up would go away on its own again like the first time, but after having it for 9 months I am uncertain. Part of me wants to come off the steroids all together and see if changing my diet has an impact, but I am very causious and self-conscious of how bad my skin will look. I also may ask the doctor about changing my combined contraceptive pill and see if this has an impact but I am not sure if its related. I am curious to see what people would advise as I am very new to this and I appreciate any help!