have severe pain and nothing shows in xrays,mri's , or cat scans why am i just dismissed?

Have had low back pain for years due to doing hard, strenuous manual labor, and also was in a very abusive relationship for years, so sure getting thrown around,kicked, pushed down stairs ect. For over a year now pain has gotten ten times worse. And now the pain is also in my right hip, and goes all the way down my right leg. I cant bare all weight on leg and sometimes my right leg  just stops working!I have fallen many times and use a crutch to get around. Have had xrays, mri's, cat scans and am told nothing is wrong! Even told me i probably have depression because nothing is showing on films. I know what pain is and know im not imagining it. Nor am I imagining this pain! My leg and hip hurt so badly that i can't work, I can't eat when in pain so have dropped about twenty pounds. how can i have all these symtoms and nothing show up on any of the films? I just want to know whats wrong and be treated for it so i can have my life back. How can a doctor tell anyone the pain they are experiencing is not really there, just because they dont see the problem on any pictures?I had one doctor whom could of fixed me but because she didnt agree with the way the doctor whom owned the practice, treated his patients.Anyway, she gave me several injections in my spine t hat gave me minimal relief and caused major swelling of my legs after third injection. While giving these injections, she found I have herniated discs, slight scoliosis, and something like radiocupathy. She had very good equiptment and could see on screen inside my body by using like a microscope that sent exact images to screen or monintor. So how can this be? And why dont doctors pay any attention to her notes and diagnosis's? They tell me my dont exist basically, even have told me im depressed and thats whats causing pain. Well I wouldnt be depressed if one of these doctors would acknowledge this is my body and i know when it is in pain. how can someones leg just giving out causing them to fall quite frequently be nothing and why do i have to lay in bed in tears because pain wont go away and i just cant get the leg to cooperate with me , i actually have to drag it or be carried when this happens. why do they get to decide i deserve to suffer?