There has been quite a bit of flu break out this year. A lot of people have had the same symptoms you are having. It might be wise if you seek the advice of a doctor to get a prescription medications to help you. if not go to your pharmacy and get yourself what you may need to counter this. Just remember you need to have this taken care of but it is something that takes some time to get over.
The symptoms you are having are indeed similar to those presented by avian flu or bird flu. However, there is no other way of telling what you are coming down with for sure, apart from seeing a doctor for tests and diagnosis. Read on about avian flu from www.mayoclinic.com/health/bird-flu/DS00566/DSECTION=symptoms.