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Based on the information provided, the numbness of right side side of body could be due to a neurological cause.
The likely possibilities in your case are Cerebro Vascular Accident ( transient ischemic attack
leading to paresis) or could be due to nerve compression in lower Cervical and upper dorsal spine region.
Using preparations containing vitamin B12
, thiamine, benfotiamine
and pyrridoxine ( oral or injectable)should help you relieve the problem.
But i would like to advice you to get a CT scan or MRI of brain done to rule out Cerebrovascular accident as you have mentioned that you had numbness of face as well. Meanwhile get an x-ray of your chest done to rule out bone pathology. Get your calcium and serum parathormone levels checked to rule out hypocalcemia
You have not mentioned about your comorbid conditions ( Diabetes, hypertension
or any other medical disorders you have been suffering from. Diabetes and hypertension act as risk factors for CVA. Based on the results of the above mentioned tests, required treatment can be given
Hope you got the solution you were looking for.
Wish you a speedy recovery.