Hi, i have another OPK question, iv been testing this month twice a day, i have a regular 28 day cycle, on cd16 i tested positive (the test line was alot darker than the control line) so i did the test again in the evening and again positve, tested twice on cd17 again both times positive, and again cd18 both times positive, i havent tested as of yet today as dont test til the afternoon, is it normal to test positive 3 days in a row? x