Concussion may present with the symptoms you are experiencing such as
loss of consciousness, confusion, headache, nausea or vomiting, blurred vision,
loss of short-term memory or perseverating. (ref: http://www.emedicinehealth.com/concussion/page2_em.htm#Concussion%20Symptoms) The symptoms may resolve after some time or may persists. After initial treatment, it is important to go to your follow-up appointments for evaluation and monitoring. Take care and keep us posted.