Help and advice

I'm 32.     Been off bc since feb 18 ,( with no period for 10 years -while on pills).  Had first cycle 18-21 of March
Just finished my fertile days ( had sex durin some of the window dates ) but feel the pms ( 2ish wks away from next period).    Is it safe to say it wasn't my lucky month.  ? Or since the prime days just passed there is still a possible chance ?