What Causes Light Headedness,nausea And Head Pressure After A Head Injury?

6 months ago i hit the top of my head and it bled quite a bit for about a minute or so... following this, I had a slight concussion. one pupil was a bit larger than the other. I was light headed and dizzy for about 2 days with a headache. The symptoms went away, and I never got the injury fully checked out, yes I know that s bad. NOw, 6 monts later, I ve had some strange symtoms such as pins and needles in my fingertips as if my hands had fallen asleep and excersise heaedahces which I ve never ever had before..Recently, after a long run (8 miles) I experienced a bad headache. I took an anti inflammatory and the headache subsided, however, for the past few days following the long run I ve been light headed, nauseous, and feeling pressure through-out my head. I m quite concerned that this could be a slow bleed from my previous injury 6 months ago. I scheduled a dr s appointment for next week.