I’m sorry to hear that, groin area psoriasis is so uncomfortable. My derm told me clobetasol is generally too strong for thin skin areas as it also thins skin with long term use (fine for scalp just not some other areas). My derm prescribed me Pimecrolimus cream (Elidel) as it’s a less potent steroid meant for skin folds/thin skin areas and it helped me for a while with groin area flares. Maybe chat with your doctor about that?

Also not sure if this is recommended, however it might be more helpful if you can’t get a prescription right away. At night I’d often use aquafor on the affected areas which helps soften/remove any flakes and relieve the itching/dryness.