Sleep. That's what I do.

Go to a doctor? If not I usually take mucinex and a decongestant and an inhaler to stave off the the symptoms and prevent fluid buildup. I would at least call your doctor to check with them what you can take though, because its free and its always better to be safe than sorry when it comes to medicine.

If it's fever, I suggest you get a small wet towel and put it on your forehead. It helps absorb the heat from your body.

Have you been working out, because that sounds a lot like Delayed Onset Muscle Soreness.