Spinal problem. And can it be solved?

So I did some extreme and unusual type of exercises 2 years ago and it damaged the natural curvature of my spine. My body tends to bend forward at my lower back. The lower back of my head and my neck pains regularly and sometimes the pain is excruciating. I cannot sit without back support and if I sit the pain on the back of my neck and head intensifies. I also face difficulties in the movement of the head. It has become difficult to carry out many physical activities that involves leaning forward and i am not able play physical games anymore. Prior to this I was athletic and played most types of physically exhausting games and now  I just can't. Not only that there is lot of discomfort and pain on my thoracic spine area. I went through this for more than 2 years because I thought after stopping the unusual and extreme exercises it will heal by itself but its the same. So I want to ask is there any way to identify my problem and can it be solved? Is there any specific test to determine