When did bleeding begin?
19 December, 2004
My periods have been, for the last 3 months, every 30 days and when thirty days passed without bleeding last Monday (Rosh Chodesh) and the rest of the week, I thought this might be the signal that I was pregnant. I went to sleep yesterday (Shabbos – day 35) afternoon at around 4 and woke up at around 5:40. Shabbos was over at 5:30. When I went to the washroom, I saw blood and realized this was my period. My question is– Which day counts as day 1? Shabbos or Sunday? I didn't go to the washroom before I went to sleep so I don't know if my period started then.
When there is uncertainty about when bleeding began, halachot are determined based on the time the bleeding was discovered. You discovered the bleeding after sunset. Therefore, Sunday is day one for the purposes of the five day count and you have a night onah for purposes of veset calculations.
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