pregnancy months broken down?

Al
Sooo here's a silly question! Is there a standard way to determine how many months pregnant you are 😂. Let me explain! There's conflicting info because typically 'they' go by 4 week months but that would make us pregnant for 36 weeks... 🤔🤔🤔🤔
Naturally I googled it and still conflicting info! 
I'm 22+2... am I 5 or 6 months 😑

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