It came on 1st with a bad headache and then 2 days later severe chills and fever. My chest and back of shoulders hurt too.
I know you asked this a long time ago, and I wonder if you have a diagnosis and treatment you would like to share? It does sound like the flu, and remember that it's possible to get a weak, flu-ish type of illness after getting a flu shot. It may also be any one of a number of other viruses. Do speak to your doctor about it if it doesn't pass quickly, or if your fever or other symptoms become unmanageable. I hope you are well! If you would like to read up on some of these symptoms, I have a few links:
Don't Avoid Getting Your Flu Shot For the Wrong Reasons
Quiz: The Truth About the Flu Vaccine
Vitamin C and the Common Cold