thank you for sharing your problem with healthcare magic.
your problem is very comen after having any accident. I belive it can be a disc heriation. it has always been present after your accidents although you are feeling it only now cause things are getting worse.
I propose you to mabe a CT of you hole spinal cord
or a MRI
cause the pain you are mentioning to different levels can be caused also by more than one hernial disc.
a disc herniation is a disc coming out from it's right position and pressing the nerv going out from the same place vausing most of the simptoms you have.
By not beeing cured the herniation increases and the symptoms are more and more visible by the time.
The solution all doctors propose for this is calming your pain with different analgesics, starting from paracetamol
and non steroid
If your pain can not be controlled by all those, a surgical intervention is proposed to the patient, which is a also a definite solution of your problem.