Ovulation...did I miss it?

Stopped taking BC a few months ago, just started TTC last month. This month I decided to take an ovulation test, as my cycles has been regular the past few months. Yesterday results were dark, but not dark as or darker than control. BD last night but husband had been drinking and couldn't finish :( Took ovulation test today and line is lighter than yesterday. Did I miss my window? I'm on day 15 of my cycle. Attached is yesterday's test (control right, result left).