 [ Symptoms ] can a cold develop into flu  i have had a cold for about 4 5 days now and just yesterday i got a headache and had a wave of nausea a few hours later this morning i woke up very sore despite having slept in my normal position and having done little physical work the previous day i have had on and off nausea all day and am feeling warm has my cold turned into the flu [ Disease ] i suggest you contact your local state health insurance counseling and assistance program ship to file a complaint and to gain personalized assistance with this matter you can find your ship programs by visiting medicare gov or call 800 medicare