You have complained of sharp type of back ache which aggravates by sitting. Mostly it could be a sprain or strain, which is always associated with movement restriction and pain on movement. You must consult a doctor at the earliest as the pain involves chest wall causing shortness of breathing.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.