Ouch!

Had fever from yesterday! I just can't stop moping about my joint and muscle aches. Are these 'terrible' signs of aging or just simple symptoms that goes with fever? I felt like I need to exercise to feel better and to shake off the pain so I went on a 3 hour walking-spree this morning (exercising while having a fever to feel better is a myth my family believes in). I arrived home at 1 pm tired, thirsty, and hungry. Then I felt dizzy, so dizzy that I need to lie down. Soon after, my body's temp just got higher and higher. I normally don't take paracetamol but this time I had to. I feel much better now at 38.7 degrees... But the aches and pains are still there and it makes climbing stairs feels like hell...