Is it just a common cold?

On Saturday, I was outside the entire day (for a twenty four hour relay), and I had a sore throat the ENTIRE twenty four+ hours. I woke up the Sunday morning all stuffy and congested. Now, one week later, I have sore leg muscles and I've been so exhausted. My symptoms (throughout the entire illness) were sore throat, runny nose, congestion, sore muscles, headache, fatigue, trouble breathing when running, and just overall feeling miserable. Should I be concerned?