Itchy and sore anus help

I've had very bad itchiness and soreness around the outside and inside my anus. I've been doctors and told i have either a fungal or bacterial infection in and around the anus and have been given 3 different creams, daktakort, fusidic acid and metonium. Can anyone help tell me in what order i should put them on? Which are for inside and which are for outside?