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I just started my period in June. Then July passed. I didn't have a period. I am 5'11 and 270lbs, very active. Is there something wrong? Or is this just normal?

Are you sexually active?

Are you sexually active?

No

Haven't had my period in 1 month not sexually active. I am 15, 5'11, 270lbs, very active. Had my first period in June and July came with no period.. should I be worried?