Hi, I have had a persistent cough since Friday afternoon (a little over two days). Today the cough got worse, I experienced chills, have a fever of 101, headache, and vomitted one bite of my dinner immediately after ingesting it. I don't have diarrhea, my nose is stuffy but not runny and I can still breathe OK. Does this sound like the flu or something else? I had a flu shot back in November but I have heard there are many different strains that are unresponsive to the vaccine.