PP sex TMI

I'm 7 weeks 5 days postpartum and I had a second degree tear and had a granuloma removed at 6 weeks PP. My husband and I just had sex for the first time today and I've been lightly bleeding ever since. I'm wondering if my period has started since the past two days when I wipe I have pink discharge. OR if maybe my tear got irritated or something. Has anyone had bleeding after their first time having postpartum sex?