One simple thought. When you were running and felt dizzy, why didn't you stop ? Concussions are not like other injuries. You can not push through the symptoms.

You should have started with 5 minutes of light running for a week or so. Then, slowly increased the time and intensity in steps of a week or so. The Buffalo protocol uses two week steps.

Where did you learn that running is OK ? Any stressful exercise should be moderated.

Your current symptoms may be with you for a week or so.