Hey ladies soo I have a wild and tmi question lol so im 3 months postpartum but exclusively…

Hey ladies soo I have a wild and tmi question lol so im 3 months postpartum but exclusively breastfeed and I was in the mood so I did the deed then the next day I started bleeding and I bled for about 2 1/2 days and it was heavy dark red bleeding with blood clots! My question is was that my period or my body just not used to foreign objects anymore and I'll bleed every time something like this happens?