6 weeks ago I was going downhill on a scooter without a helmet.

Fell, grazed my shoulders and hit my head from the back. I was a little shell shocked for the first hour afterwards but I didn't lose consciousness and I remember everything.

First set of doctors see me, take one look and say I'm fine.

Later that night, I start feeling nauseous and dizzy, call for ambulance and they do a CT scan which shows that there's no damage and 'I should be fine'.

In the weeks post scan, I have since still felt symptoms of PCS but they seem to vary each week. I have since seen two doctors and they have both said I should be fine and things should let up in a few weeks yet they haven't really.

There was a spell of 3 days or so, where I felt like the PCS was 90% gone. I had no symptoms whatsoever unless I exerted myself. But then I relapsed.

Problem, I have is that most of the symptoms are intermittent (I get all the tell-tale symptoms) But I'm in college and struggling to focus / turn up.

4 doctors have now said I'm fine but I can't exercise at all and studying has become hard 6 weeks on. At what point, should I get referred to a expert neurologist to actually tell me what exactly is up.