I haven't had a pill since Thursday. This is my 5th day. I have had cold sweats, chills, a booming headache that I still have and incredible pain. Im not as edgy today...but just how long do these flu symptoms last?? The aches, lightheadedness, nausea, diarhea. I am sooo tired....I have absolutely NO energy...I don't know how long I can do this...I need energy....I need some help!!