You have some cool videos on youtube about what to put in your bag and when to pack :) it is more interesting to watch then read :)
Im 38 weeks i packed mine at 36 weeks. I packed my son three outfits just incase . Pampers wipes a bottle just incase. Receiving blankets , beanies for the outfits , socks . And for me pajamas shower items . Lotion my inhaler , the baby book some chapstick what im wearing to leave the hospital , maternity underwear and nursing bras & nipple cream
You can start yur hospital baq anytime because yu can literally qo in whenever yur body tells you your ready ... yu would wanna pack everything the baby needs clothes id say an outfit for when you bting the baby home and one just in case he/she throws up or wets itself .. yur gonna wanna make one for yurself too yur personal items like clothes yur shower stuff toothbrush and etc . Because after having the baby your gonna wanna take a shower.