Well if you have a strong fishy smell, you most likely have BV (bacterial vaginosis) it causes a fishy smell to happen. I had that back in jan and that was the reason. its not and std it's something that just happens when to much bacteria bulids up. You sjould go to your doctor and ask to get a test done for it.
But keep in mind that std's and sti's also can cause a bad smell down there!
I wish well and hope everything works out for yu.
Also, get checked by the doctor for bacterial vaginosis. It's characterized by a bad smell.