help?

So I'm pretty sure I ovulated 4-6 days ago. I'm not sure the exact day but I did get multiple opks. Well today earlier I wiped when I peed and saw this light spotting and then I haven't gotten it again today that was it. I took another OPK and it's still pretty dark... what could that spotting be? My period is ten days away. If u have an opinion plz comment. First pic was my FIRST positive OPK about five days ago. Second pic is one I just took tonight.