so my periods have been screwed up ever since i got off birth control. my bf and i want to have another baby but i don't know when i ovulate. my period in january was january 1st-7th. my period in february was the 17-23rd. when i checked some of the ovulation calendars they have given me so many different dates. we had sex on february 27th ,29th and again on March 1st. . my question is am i ovulating at that time?