Update: I'm shitass out of luck and fucked
I'm stuck as a werewolf, I don't think growl adds a new way to cure lycanthropy and the only two vanilla ways that I'm aware of are:
>finish the companions questline (I'm locked out of this for another 15-20 levels because the enemies are too hard)
>Start dawnguard and become a vampire lord (lol)
My current character's lore is a mercenary bounty hounter that found himself as the dragonborn, now his lore is that he got fucked up, made a stupid decision, and is in search of a cure for lycanthropy