I can’t diagnose your odor, but your symptoms might be bacterial vaginosis (BV), caused by an overgrowth of bacteria, the most common reason for a fishy smell. It’s imperative to get a medical diagnosis and the right treatment, which might require antibiotics. For now, stop using any kind of oil as a vaginal lubricant. Oils and oil-based lubricants can increase risk of bacterial vaginosis. Switch to water-based sexual lubricants.
I understand that getting a medical appointment during COVID is problematic, but by now, medical professionals have created safe, efficient ways to see patients when it’s warranted. Start by requesting a phone appointment to describe your symptoms to your doctor, who will decide whether it’s advisable for you to come to the office, or whether a mail-ordered prescription will work for your situation. Don’t try to treat a sexual medical problem without a diagnosis — and no douching.