Can someone answer this for me?

Ok so me and my husband started trying for a baby going on three weeks now.i took my ovulation tests and the past couple days it was saying im in my fertile period and so tomorrow should actually say in ovulating. But this app says I should be ovulating today. Anyways, I went to the bathroom this afternoon and noticed Lil brown spots in my liner. Any ideas? Could the ovulation test be wrong and I'm just started my period?