How many months 21 weeks pregnant ? It’s 5 right

April • mum to baby girl 💖💗🥰 born 01/05/19 💗☺️💋

Some apps saying I’m 4 and half months pregnant other apps say I’m in my 5th month pregnancy when I’m 22 weeks in few days I be starting my 6 month that seems more logically to me lol is that correct ?? 😊😊😊