Hello! I haven't been able to smell or taste properly for about 2-3 we…

Hello! I haven't been able to smell or taste properly for about 2-3 weeks. Everything smells like barbecue smoke, especially meat. I can't even smell the pie in the oven, like the smell of onions when they are frying, etc. It's like strong smells. There is no cold and runny nose. What could it be related to? Thank you!