Chills, little appetite, fatigue, throat feels dry and pain felt on the back of the head towards the neck while swallowing food. feels like a pulled muscle. could this be the flu?

Yes: Yes it is possible need a little better history. When did symtoms start and with what. Any fever? Rest and hydrate. See how you feel. Make sure there is no voniting. See how you do but if you do not feel better and you get worse. See your doctor

Sounds: "viral" but not necessarily Influenza. Stay warm, drink plenty of fluids and rest. Take your Temperature twice a day and keep in touch with your PCP (Primary Care Provider) who can initiate ANTI-VIRAL treatment... Did you have a Flue shot??? If so UNLIKELY Influenxa..If NOT Antivirals ("Tamiflu") may be appropriate! Hope this helps! Dr Z