7 months ago I've had bizarre issues come on shortly after a pretty bad series of emotional events.

At first it started with a general tiredness and decreased alertness (all day long) as if a part of my mind is somewhere asleep, not allowing me to fully register or feel comfortably familiar with my surrounding. It's almost an intoxicated dream-like.

Surroundings/home seems kind of foreign, almost as if I haven't seen it or been there before, and that's a big one that has me nervous.  (Memory is there but dimmed.  I don't understand how that can happen in someone with a previous sharp memory, young, and out of the blue?? )

At times there can be a strain in my head just to concentrate.   This is nothing like me. Not long ago I had a very good keen sense of awareness. 6 months ago went to the hospital and they couldn't find anything (CT scan, routine blood work, TSH, urine)

Shortly after this my head pressure/tension in different areas, or in the forehead region. It's not a typical headache, and it's not relieved much with ibuprofen.  

It's like this all day in various degrees. 

My head also feels light (in the sense) as if it's not getting enough oxygen or blood flow.  

Other times my body might feel and feel sort of heavy.  

2 months ago went to a GP who took bloodwork with CRP (general inflammation) normal but did give me a B12 shot which did nothing.

I also can no longer handle cigarrette smoke as I almost passed out. Caffeine and sugar in small amounts make the spaceyness far worse. 

Please note that I have never had problems with these things prior to this. All this has me completely in disbelief.

Is there anyway to explain all this? How could I possibly have problems like thIs with normal blood work and scans? What concerns me most is the unique issues coupled with the duration, (7 months ago) and the fact that they DONT just come or go. 

Before this I was active getting 10,000 steps a day, healthy sex drive, weight. I did smoke, and there was some fatigue work related stress that would come at various times. But nothing too crazy.