I started on Friday with mild cold symptoms that got worse yesterday blowing my nose all day, headache, tired and stomach upset when took my vitamins, no fever though. I take Vit. C 500mg and 200 mg zinc everyday plus multi. Today congestion seems much better (took 1 musinex last night), still have stomach problems when I took Vit. C & zinc but my back aches and spasms (mid) when I twist or turn and feel out of sorts, slight cough with no sputum. Is this a viral cold?