No cough, no sore throat, just 100 fever, body aches, headache maybe a little bit of a stuffy nose. What is it a cold, flu or something else?

Viral. These symptoms are consistent with influenza or a flu like viral upper respiratory tract infection. At this time I recommend resting, good fluid intake and the use of Tylenol. If not gradually improving or if higher fever, deep productive cough, shortness of breath or wheezing see a physician.