9/12 or 9/17 Af and noticed something weird

Hey guys so maybe you all can explain to me what I saw. So I either ovulated on the 28th or the 30th(attached picture so you all can give me your thoughts to that too) and we bded 26,27,29,30 and then yesterday when I pee'd I noticed after I wiped that there was a tiny pin size smeared pinkish blood dot my nipples have been killing me too! I have never noticed this before so I'm confused is it implantation? But is it too soon for that? Can someone ease my anxious mind please?