Generally a virus runs a higher temp and may for a short time leave you feeling down but as long as you are moving air and coughing up the offending mucus you will start feeling better.
The fever not going over 102, back pain, and greenish - gray productive cough - all sounds like a possible bacterial pneumonia or bronchitis.. This can be accompanied by shortness of breath (possibly even elevated blood pressure). You won't start feeling better til the infection starts being controlled. Get thee to a medical doctor...
NOTICE: The information provided on this site is not a substitute for professional medical advice,
diagnosis, or treatment. Never delay or disregard seeking professional medical advice from your
physician or other qualified health provider because of something you have read on Wellsphere.
If you have a medical emergency, call your doctor or 911 immediately.