I have had impaired sense of smell and taste for about 5 months. When there is a strong odor of something like garlic or something, it doesn't smell like garlic. It smells like rotten meat. Everything smells like rotten meat. I have had a MRI, nasal endoscopy, I checked with my dentist, had bloodwork to check thryroid and sugar but nothing shows. I tried treating with antibiotics and it did no good. I have changed toothpaste, given up artificial sweeteners, stopped taking vitamins, changed medications but nothing seems to help. Where do I go from here?