Exactly right. You really need the right balance of your estrogen to keep your libido strong. Both high and low estrogen can cause problemsYou say .5 e3d for aromasin, you must mean arimidex right? I know for me my sex drive on any gear is really tied in with my e2 levels. Too low or too high estrogen can fuck with it. Def consider giving blood and I would of course be using n2guard for cycle protection. As far as sleep goes, any gear especially at higher doses can cause insomnia. So either you lower your dose or deal with it is probably your best bet right now for that.