Hi, I Am Almost 3 Months Pp And Have Had

Hi, I am almost 3 months pp and have had I believe 2 very light periods since. I was in labor for 27 hrs and had to have a csection due to a very large healthy baby girl. I was exclusively breastfeeding but stopped within the past week due to complications. So i havent really had a full on period because of that. After each "period" I have a very thick dark brown discharge. Almost paste like and I'm not sure what it is. It smells like normal discharge. No foul smell. Any idea what this is or if its normal?? Thanks.