Thanks for consulting us.
You need certain investigation to sort this out.
Have a pelvic ultrasound
to exclude retained products of conception.
Fix a Gynecologist appointment. Have a local examination of your vagina & cervix
to exclude any local cause of this discharge. Have a pap smear
test, if not done in the past six months.
These test will tell us about the probable cause of your problem & then an appropriate treatment can be offered to you.
Hope you get well soon.