Hay, ganyan talaga minsan, stress, diet changes, or hormonal imbalance can cause irregular periods kahit maaga or malapit lang ang cycle, kaya nag-overlap parang may two periods ka in one month. Best na mag-consult ka sa OB para ma-check kung normal lang or may underlying cause, lalo na kung ito na ang third time na mangyari. Pero don't worry, marami sa amin nag-experience nito and usually okay lang after monitoring, just keep track ng dates mo para sa follow-up!