Implantation bleeding

So boyfriend and I have been trying to conceive the last 2-3 months with no luck. Started tracking ovulation and turns out I ovulate around the end of my period. Now is about the time it says I’m supposed to ovulate regularly but in the middle of sex, we looked down to see some blood(yesterday) so we decided to stop and see what happens the rest of the day. We assumed maybe started early period but it’s still two weeks away. No blood the rest of day until this morning when I wipe. Could it be implantation? The blood does seen more rust colored than average period blood. And even more runny not as thick. Any thoughts?