Im sorry to hear about your condition
Now the most likely scenario which could be causing you these symptoms, is compression of the nerve roots exiting from the cervical spine. Im saying This because of the numbness and tingling that you are feeling from the shoulder down through to your hand. The nerves exiting the spine can be compressed due to various reasons but in your case it can be a result of the trauma that you had. The best thing to do here is to get a MRI of the cervical spine done as soon as possible and then discuss the results with a spinal or orthopedic surgeon.
There are other possibilities for the symptoms that you have been experiencing, a possibility is that of peripheral neuropathy which is a disease of the peripheral nerves which can be damaged in many conditions such as diabetes for one and vitamin B deficiency among others. This can be detected with the help of a nerve conduction study and clinical examination. The treatment is based on controlling the underlying problem and controlling the pain wit drugs like lyrica.
One more possibility is that of a stroke.... Or rather a mini stroke that would cause numbness in the right arm as well.... You should have this evaluated with a mri of the brain as well. Of course this should be considered only after a clinical exam to narrow down the possiblities.
I would suggest that you discuss these options with your doctor and have him examine you and then proceed from there.
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