I Have Stopped Bleeding About 4 Weeks Post Partum. Have

I have stopped bleeding about 4 weeks post partum. Have been dealing with infections after delivery and have a vaginal antibiotic suppository. Went through normal post partum bleeding then it stopped and changed to a yellow discharge which I found out was infection. Now 2 days of treatment I was alarmed to see dark brown thick bloody disharge and alot of it...what could it be?