What Causes Mild Headaches Along With Nausea And Neck Pain?

I have had a minor headache for three weeks ( I usually have no H/A ). Lost my voice a week B4 Christmas -
no other systems with lost voice. I have off n on very vague nausea, photophobia, no more than "normal" neck pain - and an inexplicable craving for chocolate. ( I have been on a diet since the age of 27, I am now 62, and do not, as a rule, eat chocolate. Energy is low, and I just do not feel like "me". Any suggestions?
PS I go to the gym 4 X a wk, wt is stable.