Please respond & help me out!

If this isn’t the right group I’m sorry. But I’ve gotten no response anywhere else. Ok so below is this month for me. The pink lines are my last period, you can see the only day I had sex was the 19th where the heart is (unprotected), and then on the 23 25 and 27 I’ve had dark brown spotting. And now today nothing. Could that have been implantation? I’m on the mini pill due to breastfeeding my son but he’s 11 months and we’ve started to wean. I missed my pill the night we had sex.