My chances

CHARNEL • Patently waiting to meet my 2nd little bundle of joy👶🏼❤️✨☺️ MAY 2016
Not sure when i ovulated this cycle but I never had the cramps I usually have the DIDNT BD until the last green bubble which was yesterday an then today could I still have a chance in conceiving?? How do I count DPO do I start with the first day of my fertile window