I was in a car wreck late last week. my injury was back, neck pain.i woke up this morning with back and chest pain when i breathe that is very intense?

See a doctor: The back and chest pain with breathing suggest inflammation of ribs and possibly the lining of the lungs. I would have expected these symptoms sooner after the accident, and if they are new it's possible something more serious is afoot. Clots in the lung are a concern, especially if there is shortness of breath. Please see a doctor as soon as possible.

Seek medical care: Intense back and chest pain should be evaluated ASAP. Seek care now.