fuzzy headed symptoms

For about 3 years now ive experienced problems that ive found no answer for.
My brain sometimes wont tell me all the information it needs when looking at something.
To give an example i may be in a supermarket looking for a certain item on a shelf containing lots of other items( chocolate bars for example) i know what im looking at but my brain wont tell me what item i want, then all of a sudden my brain is telling me everything and i can select the item i want.
Other examples are i may be reading a magazine with a pic of a celebrity i know but my brain wont tell me who it is until i can shake off the brain fog.
It usually only lasts for seconds but its worrying and annoying.
Ive seen my local gp and ive had a brain scan but everything was ok.
My gp gave me a test and asked me 10 questions and i got them all right so he said it dident seem to be Alzheimer's or related problems.
Im not suffering from depression and this problem is random and sometimes i dont even realise im having it.
Ive had it driving the car and im aware im driving and am able to know what is happening in front of me and can react if the car in front slows down or stops e.t.c but my brain fog seems not to be telling me other information thats happening elsewhere.
This is quite hard to explain and as it only usually lasts for seconds i can get through it ok.
December though was bad, we had visited family which was a 80 mile drive and as we set off home in darkness driving through the city which was busy with traffic i found it hard to shake off the brain fog type problem.
When i say brain fog i dont mean it seems misty but i have episodes where my brain seems to not be telling me all the information .

I was finding it very hard to concentrate on what was happening in front of me and as a cars went past all the light and shadows changed and my brain was not able to tell me the correct information and struggled to process the simple thing that your brain usually does on auto pilot.
It was like my brain was trying to process too much information and was struggling and i started to worry and panic as things seemed to be all too much and things happening too fast.
Also the colours of the car lights seemed intense whilst in brain fog mode but was normal when i seemed to get my mind back in focus.
In the end i had to pull in and let my wife drive as i was worried that i might end up having a accident or a panic attack.
When this as happened before i have shook it off in seconds and been ok but this time evertime i shook it off it came back .
When we arrived home i was feeling ok but whilst watching a tv prog about nature i was watching something happening and all i really saw was colour and shape and it was like i was watching it but not really taking it all in.
When i rewound the tape to watch that bit again i was instantly aware it was a bumblebee on a flower.

My question is what is wrong with me and as my gp does not seem to know and a specialist ive seen could not find anything wrong and put it down to old age creeping up on me.
Im a 50 year old male and work in a chemical factory and im getting worried about things getting worse and me losing my driving licence and my Job.
Im also worried to go back to my gp as he may tell me i cannot drive anymore and without my car i cannot get to work so would lose my job.
I am really worried things will get worse and i know myself that if it does then its not safe for me to drive.
Saying that i can go out and drive and not experience any brain fog for a whole week and if i do it only usually lasts for seconds.
When it does happen i usually slow down and i can understand now why older citizens sometimes. drive so slowly .
I suffer from high blood pressure and take Amlodipine for this.
I have lots of other examples of my problem but i think ive touched on the main area.
Can anyone tell me whats wrong with me and do others suffer the same problems.?

Had some tests done.
Full blood count, esr,creatinine,lft,glucose,lipds,and tft.
Also had a brain scan and all these came out with no problems.
Ive seen a psychologist and next month i am seeing a neurologist.

Im now taking Simvastatin to help get more blood to my brain.
Ive been getting the odd day of not feeling with it and being a bit dizzy/fuzzy headed and it seems to be getting more frequent now.
My episodes/brainfog seems to be improving but this feeling fuzzy headed is worrying me.
I did get this fuzzy headedness before i went on the Simvastatin so i dont think its my med that is to blame.
Some days i feel great and clear headed but other days i seem to be not quite with it but can still function although i feel fuzzy headed.
I now also seem to have a aversion to light and outdoors seems to bright and makes me more not with it.
On a evening my condition subsides !
Ive had a eye test and had my glasses checked over too and all is ok.
I dont really get bad headaches but i do feel like there is a slight pressure on my head sometimes.
Im not stressed or depressed but i did suffer some anxiety a few months back when my episodes increased.
Im fighting it and try to go about my day as normal but it is hard sometimes and im worried ill never get back to my clear headed self.