I have a 28 day cycle give or take. According to Glow, I was suppose to ovulate yesterday (Sunday). When I took an ovulation test Saturday, the lines weren’t equally dark. The test line was a little lighter than the control line. Once I entered that into Glow, my ovulation date changed from Sunday to tomorrow (Tuesday). I took another ovulation test yesterday and this morning and the test line keeps getting lighter. Does that mean I ovulate already or what could it mean?