Hello,
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If use of cocaine is the only significant aspect of your medical history, it probably is responsable for your headache, numbness along the left arm and chest discomfort.
Cocaine use can widespread effects, and also the side effects will depend on the specific type of method you take it..inhalation versus intravenous.
Chest discomfort (pain) is a well documented side effect of cocaine abuse and occurs because cocaine causes all your blood vessels to constrict, restricting blood flow to criticial portions of your body..
To obtain relief from these symptoms, you would have to stop the cocaine use. You may experience short term withdrawal symptoms but those will be temporary compared to the severe damage cocaine can produce long term.
Hope this helps, feel free to discuss further