I lost my taste for like 2-3 weeks a few months back. Lost a lot of weight because I wasn’t interested in eating as it had no taste. Smell went with it but was gone much longer. It was probably very close to if not 4 months. Starting thinking I was fucked and it wasn’t coming back. The strangest thing happened. I caught a cold, sinuses running and cough. Even with the plugged sinuses I was able to start to smell again. After a week of the cold all senses are back to normal. I almost posted in here prior asking the same advice.