Possible implantation?

So yesterday 12dpo 3 days until due period, i woke up with cramps followed by brown discharge, every time I went to the bathroom and wiped there was dark blood sorry tmi) but it was unusually light sat and cried thinking this was it I put a pad on and there's nothing on there, went to sleep thinking af was going to come in full force but it's still very light and only there when I wipe, my breasts feel really tender which never happens usually my nipples hurt a week before then stop but this is my whole breast, I feel unusually warm, even when sat in front of a fan just really confused if anyone else has had this🤷*♀️