Welcome to Just Answer.
You have probably either got an impinged nerve in the spine, or inflammation of a nerve.
This is not uncommon following spinal surgery, but seven momths on does seem a long time to still be suffering.
You would need a neurologist. He will perform tests and scans to establish a definite diagnosis and then give you appropriate treatment.
Please don't carry on suffering like this because they will be able to help you.
I do hope you get it sorted out soon so that you can return to a normal life again.
With my very best wishes