Postpartum bleeding still?

My son was born 5 weeks ago. I stopped bleeding, I thought at least for a few days, I had sex Sunday and since then I’ve had light bleeding again. Is this still pp bleeding? Or could it be my period? Related to having sex? I was cleared by my Dr at 4 weeks. With my first I didn’t get my first period til 9 months pp and then not again til I weaned. I also wait til about 8 or 9 weeks before having sex because I had a second degree tear and was terrified. So I am a little confused. Thanks for any advice.