I have had a cold for a few days and woke up with a pain in my back this morning. it is on my back left ribs and hurts to breathe in deeply or cough.?

Probably Pleurisy : What it is isn't as important as what is causing the symptoms. If you tolerate anti-inflammatory meds-you can try Acetaminophen or Ibuprofen type meds. If symptoms persist or worsen, see a dr. Right away. You may need a chest x-ray, ct of the lung or more exhaustive workup if symptoms persist for more than a couple of days or any new features such as fever or coughing up thick foul phlegm.