The problems you mention (headache, runny nose) are probably the result of sinusitis. Symptoms of sinusitis include fever, weakness, fatigue, headache, congestion. The condition is usually treated via antibiotics and decongestants. For relief of the headache you may use analgetics. You haven't described the type of pain in the leg and its location, so it's difficult to identify the cause of the pain. You may consult your general pracitioner and an orthopedist, if necessary.