Spotting 5 days after ovulation

Hi ladies! This is my first post. I had + opk on 6/2 and 6/3 and it was negative on 6/4 so I imagine i ovulated on 6/3. Last night (4 DPO) I noticed light brown spotting only when wiping and I still have it today (5 DPO). I have minor cramping as well. Being that I just ovulated last week it's too early for af and isn't it too early for implantation spotting? My DH and I are ttc. Has anyone had this or know what it could be?