I'm on day 7 and feel better, still coughing up some yellow stuff, definitely don't have much energy and my sleep has gone to crap. I retired last month after working 12 hour swing shifts, while working I was always tired from lack of rest. About a week before we left on vacation I had started sleeping all night, getting up early and felt good. Now I feel like I am back on swing shifts and was awake at 0215 this AM. I'm also very irritable.