I had sex on march 7th , which i checked and it said it was my most fertile day . My last period begain on feb 24 , im having questions on if i may be pregnant ? Please help ! And the ovulation calender said take a pregnancy test on march 18 , but i havent yet , and it said if i didnt get my period by the 24 then i may be pregnant ? But its now the 25 and i still havent got my period ? Could i be pregnant ? Plzzzzz help !!