I hit my head yesterday- still have dizziness, nausea, headache today. is this a concussion?

Post concussion: Those symptoms are consistent with post concussion syndrome. Follow with your health care providorcc to ensure that there is not a lingering structural problem.

?concussion: Absolutely this could be a concussion. Please seek medical evaluation.

Depends: The effects of concussions can vary and be unpredictable. It depends on the severity of the injury. The symptoms can include headache, dizziness, vision change (blurred vision/ double vision), nausea/vomiting. If your symptoms or headache are severe, or if you have a loss of consciousness, you should get evaluated immediately.

CONCUSSION: It is best to discuss this with a Neurologist who will study your medical history. If you are uncomfortable with your Dr. consult with another for a 2nd opinion.

Is this a concussion: Central Nervous System is a truly complex entity. No one for certain can tell you what it is unless you have been properly evaluated by a medical doctor who has enough information about you clinically.