Im sorry to hear about your symptoms. Well from what you are describing you do seem to be suffering from a minor head injury. Parasthesias (pins and needles) on one half of the body can be a sign of damage to the brain, considering that you have recent head trauma it is POSSIBLE but less likely that you have a bleed inside the brain, the reason being that if you did you would also have other symptoms like headaches, vomiting, loss of consciousness, weakness in the limbs, blurring of vision, dizziness among several others. Since you dont that is a good sign, secondly it is possible for you to experience these effects even with a severe concussion which is likely what you have suffered.
That being said, parasthesias on one side of the body, especially after head trauma MUST be always evaluated by getting a CT scan done. While it is less likely but a small subdural bleed should be excluded at all costs. It is possible for chronic subdural bleeds to accumulate over time and cause problems like these. I would strongly suggest that you DO seek medical attention ASAP by visiting urgent care or the ER and get a CT scan done, even if it is likely to be normal.
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