Please consult a doctor, preferably a surgeon ASAP or go to the ER. Discharge from the
navel or umbilicus could be due to fistula, boil,
infection or
in women due to endometriosis. Umbilical fistulas are narrow tubes the outer skin with anything inside like intestine, mesentry etc. Boils in the umbilicus can also burst and release blood and pus. In your case there appears to a severe infection, that could either be an abscess or a fistula. Please do not delay treatment.
Hope this helps.