Please help!! I had a period on July 4th. Afterwards I took 3 days of active bc pills & decided to stop to begin trying to conceive. I then had another period that started on July 15th & lasted about 5 days, fairly heavy bleeding. Trying to figure out my ovulation days, would I use the 1st period date of July 4th, or the 2nd period date of July 15th? Please help quickly, as my ovulation dates for using the July 15th date are right now!!! Thanks for any help that can be offerred! %-)