You have suffered injury by door onto the head about three days back. The complaints of light headedness, sleepiness, tiredness may not indicate concussion head injury
. The specific symptoms associated with concussion head injury are nausea, slurred speech, memory loss
. If you have any of these symptoms following head injury you need further evaluation and treatment. Since from the history you had bleeding from the injured site, you need to consult your surgeon to look for any lacerated wound which may require suturing.