Hello and welcome to HCM,
Persisting pain in lower back could be due to non-union of the
fracture.
I suggest you to consult your orthopedician for clinical assessment and X-ray of the region to assess the fracture healing site.
Associated pain in the chest region could be due to associated fracture of ribs also.
Thus, the ribs also need to be assessed.
In the meanwhile, you can take pain-killer for the pain.
Since, you are experiencing stomach pain also, you need to take
proton pump inhibitor also to prevent acidity or regurgitation.
At the same time you are experiencing fullness of stomach.
For fullness you need to consult your gastroenterologist.
Fullness can occur due to
gall stones, thus an
ultrasound abdomen is required.
Thus, you need to
consult a gastroenterologist for this problem.
Thanks and take care
Dr Shailja Puri