Still have mucus in throat and dizziness but no more fever or vomiting. new symptom is bad muscle aches. what could this be?

Viral: This sounds like a viral syndrome. You started with upper respiratory symptoms including mucous drainage and systemic symptoms like fever. Now as you recover, you are experiencing achiness and fatigue. This is classic for a viral syndrome. Get plenty of fluids and plenty of rest. You should make a full recovery. If symptoms worsen or new symptoms appear, you will need to consult with your doctor.