The Wooden Chair I Was Sitting On, Broke In Two

The wooden chair I was sitting on, broke in two and I fell back landing on my spine. After six mths of physio, I still have a very tender spot in t10-t12 area and after sitting for only 5 minutes, I get pain in this area, then a burning sensation starts which radiates out to my sides, followed by excrutiating pain in spine area. Have been told I have soft tissue and physio says that I have to stretch it out but this has not worked and now I am getting some nerve pain. Years ago I was told I had bulging disc in t4 and t5 area but I don't seem to have the pain in that area and that never bothered me before.