Help please explain

First time tracking Basel body temp using Apple Watch can anyone tell me when I ovulated and why I spotted a few days ago we aren’t trying for another just yet as I have a 10 month old we bd before ovulation but I didn’t mark it and can’t remember what all days it was I know for sure the last day of my period and 2 other times not marked he pulled out but can someone explain the spotting I hope it’s not implantation bleeding it was verry light almost didn’t notice it only when I wiped once in the morning never spotted before between cycles except when I was pregnant with the twins implantation but it was much heavier than this photo below of toilet paper please help me explain this when did I ovulate and could this be implantation bleeding because I know we aren’t exactly being safe and I wanna say he didn’t pull out all the way 3 days after period or let’s just say it was out but close