Need help!!!

So my period was due several days ago. Me and my husband had sex one time last month but it was after my fertile window or as I think.. maybe it was. But I haven't got my period yet, no sign of it either. And I'm having white creamy CM. Can anyone answer why??? >>>>> if this is anything I should be worried about or what's going on? Can anyone relate. I'm worried I haven't got it yet. My last period was may 6th-11th. Thanks..