Hi Beth,
Welcome! Yes, the symptoms listed sound post-concussion: dizziness, headache, nausea, and confusion. All are common effects. Depending upon the severity of your concussion (traumatic brain injury-tbi), your symptoms should begin to fade as time passes. Some people continue to fight the symptoms for the rest of their life - though their injuries are more severe.
I definitely agree with the previous poster about seeing your general practitioner for a follow-up. Hopefully, you've seen him/her regularly for a long period of time, and they will be able to give you a better idea of what to expect. Do check out the sites below. The first is fabulous at explaining the entire process of TBI- injury, recovery, acceptance, loved ones, etc.
http://www.tbiguide.com
I survived a mild TBI, after slipping on the ice 3/07. I had intracraneal bleeding, and was watched by neurosurgery - but didn't need a flint, thankfully

. A few of the post-injury symptoms have remained a part of my life: confusion, memory (but that was bad before the fall- now it's just really bad!), headache, and unable to multi-task. That multi-task one is a very tricky skill that people take for granted, until they lose that ability.
I wish you the best of luck & hope you fully recover very soon

!