This is the 2nd month off BC and my period was only 3 days late. Me and my husband are TTC and we aren't pregnant yet (hopefully soon) I'm trying to figure out when I will ovulate? My last period started April 4th-9th 2017. This month it started May 7th and suppose to stop on the 12th. According to this <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> my "fertile window" is next week.. when will I ovulate?