Pink tissue like discharge after period?

mtl

I just had my period for 22 days. Yes, 22 days of bleeding. And the day after it ended, I had a small, but noticeable, amount of very light pink colored discharge. It was like mucusy, but much much thicker, I guess? Very tissue like. I've never had it before. It lasted for two days, and kind of stopped. I still have a small amount today, but not much. Any ideas what it could be?