Hello,
This can be due to bacterial vaginosis or trichomoniasis. The characteristic symptom of trichomoniasis infection is a heavy, frothy, yellow-green, fishy-smelling discharge from the vagina. The infection can also cause discomfort during sex, vaginal itching, pain when passing urine and occasionally stomach pains.
It is diagnosed by pelvic examination, swabs of the discharge and their culture sensitivity
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
it could have something to do with the copper being inserted. i would say you have an infection if you have a green discharge and its that smelly. you need to see your doctor asap