nausea, vomiting, excess sleep, severe headache, difficulty in walking and balance, tremors, seizures, vision problems, ringing in ears
etc then consult a doctor immediately as these are signs of head injury. These symptoms
develop if there is a brain injury or bleed. Since you had nausea, vomiting, excess sleep—whatever may be the cause—its best to get it evaluated in a setting of a fall that you do not have much recollection about.