I was very nauseous two days ago and had a headache and was very fatigued. Yesterday I was fine, all I had was a stuffy nose and a slight headache. Today, I felt fine, but as the day dragged on, my headache returned, fever returned, fatigue, runny nose, and little pink spots have appeared on my chest and neck . They are not itchy or painful, they have just appeared on my skin. What is this?