Symptoms are a runny nose, inner ear pain, headache, achey joints, tiredness and lack of appetite. What do I possibly have? Symptoms come and go...

Could be flu. You could have influenza or another upper respiratory viral infection. Sometimes these infections also give you aches and fatigue. If your symptoms are severe see your doctor. If your symptoms have been going on longer than a week or two I also suggest that you see a doctor to get an exam and possibly some blood tests done to determine the cause.