Constant Groggyness - Related to head injury?

Around 3 months ago I had a drunken fall onto a concrete floor, hitting my forehead hard and splitting the skin open. A day later I started getting vertigo. Every time I sat up from lying down or vice-versa, the room would spin really badly. This recovered after about a week, but i still had other symptoms that remained until a month after the fall such as feeling disconnected, brain-fog, groggyness.

My doctor put me on Prochlorperazine for a week as he said I had 'mild residual vertigo' and a day after coming off the tablets I felt back to normal for a day. That evening I took a Diazepam for a crick in my neck that had developed during the day and the next day I woke up feeling fatigued.

The fatigue has continued since then (about 2 months) but along with it I have a groggy feeling like being slightly tipsy and a kind of brain fog where I don't feel completely with it. I also get occasional fellings of falling or shifting that last for a second or two about 5 or 6 times a day. On top of this I have a tension at my temples which feels like someone is pressing on them constantly. My eyes also feel like the cannot focus properly too.

The symptoms vary in severity but the brain-fog; groggyness and tiredness are always there to some degree. When I am in a situation with lots going on (for example looking for something specific in a large; busy; unfamilier shop) They symptoms get worse and I feel overwhelmed and as if I am drunk.

I have been to my GP had a CT scan and blood tests which have all come back clear. I have also seen a consultant neurologist who told me that there was nothing wrong with me; that it was brought on by anxiety and that I sould stop worrying so much.

I don't thin it is anxiety as the nly times I feel anxious are when I think about my symptoms. The anxiety may be making things worse, but I think it is brought on the by the presence of the symptoms.

My co-ordination, memory etc all seem unaffected, which make it difficult for the doctors to understand what I am feeling

Does anyone know if this could be related to the head injury or if it is likely to be something else and the timing is just co-incidental?

It doesn't seem to be debilitating in any physical way, but it's absolutely horrible, and the reaction I have to busy places has made me somewhat reclusive.

Thanks loads.