Of course it is a concussion. You are suffering from post-concussion syndrome. You need time to recover before you return to play.
From NEUROSURGERY://ON-CALL
Quote:
People who suffer a head injury may suffer from poor memory and concentration, headache, fatigue and dizziness for weeks or months. This is known as post-concussion syndrome. Athletes should not return to play while experiencing these symptoms. Players who suffer repeated concussions should consider ending participation in the sport.
Athletes who return to play too soon after a head injury are in danger of serious harm and even death. Second Impact Syndrome occurs when an athlete who suffers a mild head injury returns to play before the brain has fully healed and incurs a relatively minor second hit. The result can be a rapid, catastrophic increase in pressure within the brain. The athlete may suffer paralysis, mental disabilities and epilepsy or death.
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Link to full article
Do not play while these symptoms persist. Seek medical attention with a neurologist or neurosurgeon.
Any goaltending advice I offer may be somewhat suspect, but on this one I know what I am talking about. If you ignore this condition you are putting yourself at significant risk.