i have had what seems to be the stomach flu for the last 4 days - lots of vomiting, a bit of diarrhea, fever, chills, etc - havent been able to sleep properly or keep much down - i used gravol suppositories to calm my stomach and taken pedialyte to prevent dehydration - i am feeling a little better now, but feel a bit dizzy and lightheaded, extremely fatigued and have incredibly low concentration - is this normal?