I think I am recovering from empty nose syndrome. Is it normal to lose my sense of smell/taste?

Last thursday night I was barely able to sleep because I had really achy and dry sinuses. It almost felt like I had a sore throat up my nose the whole night. I could barely sleep. The next day I felt like crap because I had some flu symptoms and my nose was really runny. On sunday I began to feel better but I still had the sore throat feeling up my nose. On monday through today I've been getting a lot of yellow phlegm, but its really odd because I can breathe normally, and I still get a lot of really sticky yellow phlegm when I blow my nose. I also have noticed that I cannot taste or smell my food the way I normally do. Is this normal? I have not yet seen a doctor or anything. I have just been doing a lot of research. You can't believe how hard it was to find something that fit my description.