Period after birth.

So I had my son Feb 17. Unfortunately breastfeeding is basically off the table I still try but mostly exclusively pumping for him. I've had very light spotting here and there it's not every day just random. (I only bled for 2.5- 3 weeks then it stopped after he was born) I'm wondering if this is my period trying to come back or the remains of the normal bleeding that follows birth.

We've started having sex again and I wanna track sex & periods but havnt had a period yet. We've had sex twice once protected and once without.