I did my first Ovulation Test yesterday and worked out my Estimated Date for ovulation via calculator - I have a faint but visable line for ovulation and my calculator tells me I should be ovulating from 17th (my birthday) until Friday 22nd (DD's Birthday) - that was worked out on 31 day cycle, but I'm not sure when I will truly ovulate because AF was late.... - should I work out my cycle on previous AF's and ignore last AF due to lateness, or should include it?? Not sure really don't want to mess this month up!!