When I left the hospital on sunday after having my csection I was not warned about the term wound…

When I left the hospital on sunday after having my csection I was not warned about the term wound seroma! Woke up this after noon with my panties covered in blood and blood on my bed. Went to the er bc I thought my incision had opened. They said it was a pocket of fluid and blood under my incision that found the weakest area to release.