What would cause neck pain, back pain, jaw pain, foot pain, chest pains, and an ear ache?

Here is what my past week has been like and I can't find anything online that explains this or describes anything similar.

Day 1: I woke up with a really stiff neck that really hurt when I turned to the left.

Day 2: Same symptoms, only now I had an ear ache on my left ear.

Day 3: The neck pain almost completely went away, but my upper back became sore and stiff. My back began to swell along the spine between the shoulder blades. I rested my back all day. The arches of my feet were cramping up and were in pain.

Day 4: No more neck pain. The ear ache went away. Now my lower back is very stiff and I am experiencing chest pains on my right side. I still have foot cramps that are somewhat painful.

Day 5: Back pain is minimal but still stiff, specifically on my lower back. My jaw, on the right side, is somewhat stiff. After a few hours my jaw felt fine.

Day 6: Still a little stiff on my lower back. After not resting all day, I had some sharp pains in my lower back. These immediately went away when I rested. My jaw muscle on my right side is very very stiff. No popping or cracking. No real pain. It is just very very stiff and it's hard to close my mouth. I woke up at 2:30 am with hardly an jaw pain or stiffness whatsoever, but woke up at 6 am with a very stiff jaw. I only ate soft foods and rested my jaw as much as I could.

Day 7 (today): I woke up with my jaw being worse than ever. There's hardly any back pain and the foot pain has subsided. My left jaw muscle is somewhat sore too, but not anything close to as bad as my right jaw.

Note: I don't grind my teeth, haven't chewed gum recently, and haven't eaten anything that is hard to chew for a few weeks. There is no pain at the jaw joint (right in front of the ear), just between the jaw bones. I don't have a history of TMJ nor any back problems. I don't have any tooth pain.

Any ideas?