Spotting

Melana
So I had my period a little over a week ago. I started taking ovulation tests the day after it ended. Yesterday I had some spotting and very little cramping. The OPK was negative. Also took one today and was negative still. I don't normally have mid cycle spotting so what could it be? Could it still be ovulation even if I don't have a positive OPK? We are only ttc for a couple months.