Suggest Treatment For Vaginal Discharge With Fishy Smell

hi i have a large amount of discharge from my vergina and a bad kind of fish smell that has been there for about 3 months and its starting affect my personal life with my partner. im supost to go for sugery but still waiting for a app through out patients. i have taken these before for the same thing and have some left should i take them, and it doesnt seem to matter how much i clean it still comes back. would this be a ongoing thing?