thank you for sharing your problem in healthcare magic.
Pains generated from traumas are in general complex pains. This means they have many causes : emotional, muscular, articular, bones and inervation.
If your MRI
didn't show any problem with your bone and articulations they can be caused by the torsion of all the muscles in that area. A big part of it can be caused by the herniatic disc that was shown in MRI. Doctors might have said you that it can't be responseble for all your pain, especially if it is a small herniatic disc. I belive that the pain also has his emotional components. In 2 patients having the same problem, the perceptation of the pain can be different and also in the same patient having a problem the perceptation of the pain can be different in different times.
What I suggest are Anti inflammatory non steroidal drugs against your pain, but this is not a final solution for a herniatic disc problem. You have to check out with your doctors if they can intervent.