Late periods?

Monique

Does anyone know how or why I'm constantly late for my period? The ticks are when I got them and each month is an individual one and this was normal for me?

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Month

But May was the last time I had it normally then I skipped until today (August) so I was wondering why I constantly miss it? I know being underweight is a reason for it but I'm clinically obese and have a binge eating disorder so I really don't know?