I had my lh surge

Tiffany • Mon, Jan 29

So I took an ovulation test starting the first day of my fertile days the 24th and it came back negative. so I took it again the 25th. We BD both nights and the 27th. I am hoping this is our month and hoping its a girl. I also googled on ovulation test they don't actually tell you when you ovulate just when your about to. So how do yo know when you do?