I'm only on day 3 of my first run at 60mcg, but these past three days, about one hour after taking it, I've just been KNOCKED OUT. Hell, after the first day at only 20mcgs, I took a 14 hour nap, woke up, took my clen, and slept for 4 more hours. What the hell is that all about? Is there a way to combat this, I can't make it through the day like this...