I got a concussion on christmas eve last year. today (feb 9) i'm really dizzy. could the dizziness be from the concussion?

Concussion?: Would not be high on my list of possible causes if you have had no symptoms since your initial injury until today, and have not had a re-injury. This does not sound like "post concussion syndrome",but it certainly sounds like if the symptoms persist you should at the very least communicate with your PCP. If they worsen, I would consider in the emergency department