Two things you should avoid for now. 1. No more colloidal silver. There are other, safe r options for treating a cold sore That is certainly where the metallic taste came from. Perhaps you used too much. 2. Stop the oil-pulling. You obviously overdid it with that. While t here is scientific evidence of some benefits of oil pulling with coconut oil, high-quality evidence is somewhat lacking. How much salt did you use? The rule of thumb is 1/2 tsp of salt in 8 oz. of warm water , 3-5 times a day. But that is used for inflammation and infection, not a bad taste. However, the salt water rinses (if the appropriate dosage) would have helped the sore alone. Too much salt will dry out and irritate the oral tissues. If you have irritated your mouth with the salt water and silver, spicy and/or salty foods and alcohol will continue to irritate it. And here is information about your dangerous use of colloidal silver: Colloidal silver is a mineral. Colloidal silver products were once available as OTC drug products, but in 1999 the FDA ruled that they aren't safe. Colloidal silver can kill certain germs by destroying proteins, which is why it was previously used in wound dressings. But silver has no known function in the body and is not an essential mineral. Taking silver by mouth can cause the skin to turn a permanent bluish color. It can also cause brain function problems. Colloidal silver has been used for infections, hay fever, skin conditions, and many other conditions, but there is no good scientific evidence to support any of its uses. It can be unsafe when taken by mouth, applied to the skin, or inhaled. Stick to mild, bland food for 3-5 days. Stay away from excessively hot or cold food and drink. Alcohol also dries out the mouth, so stay away from that. If you want to attempt to use salt water, try it in the dosage I provided. if that makes your symptoms worse or they don't improve, stop using it and get to a dentist or oral surgeon. Dr. Conrad