and i'm sorry i don't have real concrete advice for you (altho' i've known psychosis, it was pure me, no steroids involved

)
however, your post reminds me to be kinder to my 4 yr old, who takes prednisone semi-regularly & is having some real behavior issues right now. thank you for telling me what it's like, with grownup words.
my ex sil has lupus and it has been a rough ride. i will pray for strength and lucidity for you.
susan