Ah you should be cool then...yeah a cold turkey benzo detox is quite possibly the most brutual and frightening thing a person can go through next to war...im seven months out and still suffering the consequences!
I smoked lots of weed, pretty much everyday for ten years, so I think it contributed to my AF definitely...it never really gave me fatigue just the nice stoned fatigue of an evening, but it definitely messed my brain up! theres lots of evidence on long term mari use...i think its more the mary jane we get these days and the chemicals its grown with, in the UK, all we get is hybrid crap, natural grown im sure would be fine.
Never heard of natural killer cells..you mean white blood cells?