How long is confinement ? Is it 28, 30 or 31 days?Is it on day 31 we can start blow fan or need wait

i did mine for almost 40 days. i started blowing fan only after 28 days, i counted from the day i discharged from hospital. i showered the next day after birth, my gynae told me to do so hahaha then i showered everyday with herbal til end of confinement. washed my hair once a week during confinement as my arms were too tired to handle hair dryer🤣🤣wore long sleeves, long pants & socks for the 1st week and develop heat rashes lol think too warm so changed to short sleeves from 2nd week onwards, the rest remain. throughout my confinement i do it w/o ac.