Hi there ~
I understand your concern. The headache and bump on head with weakness and shooting pains in legs, arms and blurred vision
seem to be related. The commonest cause is a concussion
in the region of the head where you fell and bumped your head. I also think that medications to help with neuropathic pain
should be able to help. However, I also think that a visit with a neurologist
will be helpful. I think that you should also find yourself an ER and walk in so that you get immediate attention.
I hope this helps. Take care and have a lovely day!