donating blood every 12 weeks just because your on gear and think thats what you need to do can cause more harm then good . even if your hematocrit is elevated (thats actually a benefit when being on AAS) there may be no point in donating blood. you need to look at your platelet count, IF thats elevated along with elevated hemo then yes thats an issue . if not , then no biggy imo.
apart from hematocrit hemoglobin, some guys just don't produce a ton of new RBC's , even when on cycle, they are just holding a ton more volume of water nutrients electrolytes etc in their blood compared to normal. donating blood in this case can help them feel better just to lose a little bit of volume (though the more volume you have the better your gains and appearance will be).
so there is no fixed 'rule' about blood donation. its person dependent and you may cycle gear for 10 years and never donate and be just fine.. or you could donate every 56 days just cause you think you should and end up iron deficient and sick.
as for lethargy . it comes and goes and is part of everyones life they have to deal with. don't blame a thing on AAS usage. your grandma is probably more lethargic then you and she doesn't take Tren
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