So I got my period a day before what it says on the <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> but they only last four days so my question is when it ends on Friday I'm hoping and me and my fiance bd every day after or almost everyday and my fertile window is sept 4-10 and we bd every other day too what are the chances I'll actually come out pregnant? Answers please and I diff could use some bad thrown my way too!