Girls, I have a question...I've been having postpartum discharge for half…

Girls, I have a question...I've been having postpartum discharge for half a week now (after delivery bleeding)...Yesterday I saw some discharge on my underwear and today too...Is this happening again? Yesterday I couldn't go to the bathroom, sorry, it's a big deal...I think maybe I strained something in my uterus, so something must be wrong? We're breastfeeding...for periods, it seems early... I'm still taking birth control pills, I've been doing that for five days, but we haven't tried sex yet... So I'm thinking what is this? Maybe someone has experienced this?