im in my forth week of t400. and i have this feeling somethings wrong. i mean im tierd as **** all the time but i cant sleep because everytime i nodd of i get these attacks ware my pulse races and i feel like i have some kind of circulatory problem, its ****ing freaking me out its like i cant stay still for long periods of time. Im very figity, and irritable. im kinda scared. does this happen to anyone else