Depression, fatigue and blood oxygen levels

I am a very fit, thin, non-smoker  52 year old male who has experienced fatigue, sleep difficulties, anxiety and low grade depression continuously for over twenty years. I recently had a 24 hour blood oxygen level test to determine if I had sleep apthnea. There were no nigfht time variations, but the level was consistantly about 95% day and night, still considered in the normal range.  The people around who tried this seemed to run 98 or 99%.  Is it possible that that a 95% reading could be responsible for the various cerebral symptoms I experience.  I have found very little about this on the web-only discussions that 90 or 92% is cause for concern but 95% certainly seems suboptimal and logic woulod say there is not a line drawn below which you have problems and above which there are none.  I take Celexa and ativan which could conceivably slow my respiratory rate (my ttheory).  Does anyone have any insight?
Thanks.

[LeftCoastChick]

I would really speak with your medical practitioner, this is a pretty complex question that no one here is trained to answer.  You could ever speak to your pharmacist.