This is an endo-perio lesion. After the root canal, cap needs to be fixed to protect the filling from coming out. Since cap was not fixed(assuming), the filling has come out and there's high possibility that your tooth might break soon.
Regarding bleeding of gums, your dentist might advice you to get deep scaling done.
Next Steps
Visit your dentist as soon as possible and get it fixed.
Health Tips
Tooth is in danger. Save it quick by visiting the dentist ASAP.